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Human Factors Expert Witnesses

Human factors expert witnesses and consultants listed here may be able to form expert opinions, draft expert witness reports, provide expert witness testimony at deposition and/or trial as or serve as consulting (non-testifying) experts on human factors. The human factors expert witness listings on this page are typically from fields/areas of expertise such as: Accident Reconstruction, Agriculture Engineering, Architecture, Automotive, Automotive Engineering, Aviation & Aerospace, Biomechanics, Biomedical Engineering, Engineering, Ergonomics, Human Factors, Industrial Design, Information Technology, Intellectual Property, and Legal Nurse Consulting.

Jason C. Fries

CEO & Lead Forensic Expert
Nightime Visibility
Highly Experienced Expert

Dennis McBride, PhD

Highly Experienced Expert
Human Factors
Author & Speaker

James M. Miller, PE, PhD

Mechanical-Human Factors
Accidents-Chemical Safety
Warning-Labeling-HazCom

Michael Vredenburgh, M.S.

Human Factors, Biomechanics &
Digital UX Expert
Experienced Expert Witness

Kevin A. Rider, PhD, PE, CHFP

Forensic Human Factors, Owner
HF testimony nationwide
Phone: (833) 343-9778

George Page, BSE, MSE, CPE

Human Factors, Ergonomics
Industrial Engineering
Highly Experienced Expert

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Craig Rosenberg, Ph.D.

User Interface, Software Engineering, VR, AR, GPS

UI.EXPERT

Human Factors, Software Engineering - user interface, user interface design, mobile software, smartphones, software, software engineering, software architecture, virtual reality, augmented reality, GPS, human factors, display design, virtual environments, augmented environments, systems engineering, simulation, software development, UI, User Interface

Dr. Rosenberg has been retained over 160 times, has testified at 12 trials in both State and Federal courts, testified at over 60 depositions, and has written over 140 expert reports and declarations. Dr. Craig Rosenberg has worked on many high-profile cases and advanced engineering projects for a wide range of Fortune 500 companies including Google, Samsung, Amazon, Boeing, IBM, Disney, Uber, Lyft, Huawei, Nintendo, BMW, Mercedes, Dell, AT&T, Zillow, Motorola, BlackBerry, Ericsson, LG, Sony, HTC, Mattel, United States Army and Air Force, Federal Aviation Administration and many others. Dr. Rosenberg is the founder of Global Technica and is an accomplished human factors engineer, user interface designer, software engineer, and systems engineer with extensive expert witness experience specializing in user interface design and human factors issues for embedded, mobile, web, desktop, and server software. Dr. Rosenberg specializes in software engineering, user interface design, infor...

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Kevin A Rider, PhD, PE, CHFP

Human Factors Expert

Forensic Human Factors, LLC

Human Factors, Traffic Engineering - Distracted driving, Driving behavior, Reconstruction, Biomechanics, Maritime, Manufacturing, Mining, OSHA, Premises Liability, Products Liability, Safety, Slips, Trips, Falls, Transportation, Warnings, Conspicuity, Cell phones, Texting, Lighting

Dr. Kevin Rider is a human factors expert and owner of Forensic Human Factors, LLC, providing investigations, reports and expert testimony for personal injury cases – plaintiff and defense. His expertise involves investigating how people interact with other people, products and environments in predictable ways, and applying this understanding to effective, efficient and safe products, services and systems. He has been consulted as an expert in 49 states (so far). Dr. Rider’s expertise includes: • MVAs and pedestrian collisions, incl. trucks, trains, buses, motor/bicycles • Illumination, nighttime visibility, and conspicuity • DUI/DWIs, where intoxication was not a proximate cause of crash • Adequacy of product designs and warnings • The design and maintenance of safe civil and occupational environments • Premises liability, and slips, trips and falls • Workplace and construction safety Dr. Rider is a Professional Engineer (PE), a Certified Human Factors Professional (CHFP), and ...

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Jonathan S. Lee-Confer, PhD

Biomechanist - Univ. Arizona Professor

Verum Biomechanics

Tucson, Arizona

Biomechanics, Premises Liability - Slips, Trips, Falls, ADA, Biomechanics, Injury Causation, Slip-Resistance Testing (tribometers), Pedestrian Reconstruction, OSHA, ASTM, Code Compliance, Building Codes, Stairs, Walkways, Awareness, Visual Detection, Human Factors, Gait, Hazard Warnings, Walking

Dr. Lee-Confer is a biomechanical expert specializing in injury causation, human movement, and walkway safety. As Director of Biomechanics at Verum Biomechanics and Assistant Professor at the University of Arizona, he combines academic research with practical litigation support. His expertise spans: Slip, trip and fall biomechanics (injury biomechanics) Floor slip resistance testing (tribometers) Gait analysis and movement dynamics Code compliance (ASTM, ADA, IBC) Premises liability and safety standards A contributing author to ASTM F2508-16e, the standard for tribometer validation, Dr. Lee-Confer’s work directly informs measurement of walkway slip resistance—a key factor in many slip-and-fall cases. He also played an instrumental role in Arizona Senate Bill SB1373, advancing fall prevention measures. Dr. Lee-Confer holds a Ph.D. in Biomechanics from the University of Southern California, with specialized research in slip detection, motor control, cause of injury to anatomic...

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Leslie Weintraub, OD

Forensic Visibility Expert & Medical Optometry

Tucson, Arizona

Optometry, Human Factors - Forensic Visibiity, Malpractice, Human Factors, Conspicuity, HGN, DUI, DWI, Forensic Vision, Optometric Malpractice, Eye disease, Alcohol and HGN, Forensic vision and accident, Discernibility, Medical Optometry, Reaction Time, Perception, Glare, Accident Reconstruction Visibility

Dr. Leslie Weintraub, O.D. Board Certified Medical Optometrist and Forensic Visibility consultation/expert witness services for the plaintiff or defense. • Optometric medical malpractice, over 30 years of clinical experience • Forensic Visibility, dynamic VA, conspicuity and discernibility evaluation for automobile, commercial vehicles, pedestrian, bicycle and train accidents • Accident Reconstruction Visibility • HGN/DUI • Speaker/educator and author in publications involving visibility and automobile highway safety, bicycle and train accident reconstruction and HGN/DUI

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Robert T McCarthy

Career railroad officer - Subject matter expert

TotalRail, LLC

Rio Rico, Arizona

Railroad, Accident Reconstruction - Event Recorder, Locomotive GE/EMD, Positive Train Control, Train make-up, LDVR camera, Trip Optimizer/Leader, Distributed Power Locomotive, Federal Regulations, Railroad Operating Rules, Crossing collisions, Railroad training, Derailment, Employee discipline, Passenger/Freight operations, Fatalities, Employee injury, Human Factors

Railroad Safety & Accident Reconstruction Expert | Locomotive Engineer | Former FRA Investigator Nationally recognized railroad safety and operations expert with over 40 years of Class I passenger and freight railroad experience. Current Class I locomotive engineer and certified Supervisor of Locomotive Engineers. Former Class I railroad executive and Federal Railroad Administration (FRA) investigator. Trained by both the FRA and National Transportation Safety Board (NTSB) in advanced post-incident and accident investigation techniques. Expert in reconstructing complex incidents — including train–vehicle collisions, train–pedestrian/trespasser strikes, improper train make-up, and rules violations. Skilled in cutting-edge event recorder and locomotive camera analysis software. Proven track record in high-profile and multi-fatality investigations. Founder of TotalRail, LLC (est. 2018), recognized for uncompromising, detail-driven investigations and authoritative subject matter expe...

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David Paulus, PhD, PE

Mechanical Engineering & Human Factors Expert

Paulus Consulting, LLC

Fort Smith, Arkansas

Engineering, Intellectual Property - Mechanical Engineering Expert, Intellectual Property, Patent Validity, Human Factors Expert, Product Liability, Mechanical Design Expert Witness, Patent Litigation, Safety, Patent Infringement Expert, Industrial Engineering Expert

Dr. David C. Paulus is a nationally recognized expert in mechanical engineering, human factors, and product design, with over two decades of academic, research, and litigation consulting experience. He holds a Ph.D. in Mechanical Engineering from Colorado State University, complemented by a Master’s in Industrial Engineering and a Bachelor's in Mechanical Engineering from the University of Tennessee. He currently serves as a Professor of Practice and Director of Graduate Programs in Engineering and Operations Management at the University of Arkansas, Dr. Paulus is a Professional Engineer (PE) and Certified Human Factors Engineering Professional (CHFEP). Dr. Paulus offers an exceptional blend of technical depth and legal acumen, having served as an expert witness in over 30 product liability and patent litigation matters, including high-profile cases involving Peloton, Big Ass Fans, ICON Health & Fitness, and Mad Dogg Athletics, among others. His expert testimony spans federal and ...

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Peter DeNucci

Aviation accident investigator discovering RCCA

Apollo Publihing, Inc.

San Diego, California

Aviation & Aerospace, Human Factors - Aviation, Airline, Root Cause, Human Factors, Aeronautics, Unmanned Aircraft, Systems Engineering

Peter DeNucci is an accomplished US Airways Captain (ret) having logged over 18,000 hours in numerous Boeing and Airbus aircraft. Most recently he flew as Senior Principal test pilot for Northrop Grumman and the Air force with the HALE unmanned division, where he insured the Root Cause procedures were correctly implemented. Peter is the author of several books focusing on Safety Culture and change management. These books were the foundation of airline transformations in the cockpit during the past 30 years. Captain Sullenberger (Sully) and Captain DeNucci were flying US Airway’s planes during the initiation of Human Factors and Safety Culture in 1991. While Sully was teaching in universities, Peter was teaching at US Airways and Hospitals. In fact, if you have seen Miracle on the Hudson you will see Peter’s communication procedures used with the flight crew. Captain DeNucci has consulted and created environments for change with his five-step leadership model and the Just and Safe...

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Kenneth A. Solomon, Ph.D., P.E., Post Ph.D.

Institute of Risk & Safety Analyses

Woodland Hills, California

Biomechanics, Accident Reconstruction - Human Factors, Animations, 3D Scans, Photometrics

Specialized forensic staff, broad range of consulting and expert testimony, 47 years of courtroom experience for Dr. Solomon, combined courtroom experience for company 334 person years. Accident reconstruction, biomechanics, human factors, safety, accident prevention, adequacy of warnings, computer animation and simulations, 3D scanning & photometric analyses, drone photography, construction defect, criminal defense, criminal prosecution, premises, product integrity, product liability, product testing, warnings, and lost income calculations. Auto, bicycle, bus, chair, elevator, escalator, forklift, gate, ladder, machinery, motorcycle, press, recreational equipment, roller coaster, slip/trip and fall, stairs, swimming pool, and truck. Litigation and claims, defense/plaintiff, educational seminars, and mediation and arbitration services.

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MARTIN M BALABAN, PhD, PE

AR TECH

Encino, California

Accident Reconstruction, Safety - Vehicle collisions, Premises liability, Safety, Code Compliance, Construction & Industrial Accidents, Failure Analysis, Human Factors, Biomechanics, Mechanical Engineering, OSHA, ADA compliance, Products Liability, Criminal, Licensed Safety Engineer in CA, Slip & Fall, Slip and Fall, Trip & Fall, Ladders, Trip and Fall

Vehicular:  all vehicle types, multi-vehicle, bicycles, pedestrians, skidmark analysis. damage-matching, occupant biomechanics. visibility & line-of-sight analysis, traffic signal phasing, vehicular component defects, seatbelts. Premises Liability: Code Compliance, Slip, trip, floor friction testing, stairway & ramp accidents, glass injuries, guardrails; illumination issues; manual & electronic gates, ladders, door closing mechanisms, falling objects, structural failures. Occupancies include single- and multi-family residences, retail stores, office buildings, garages, sidewalks, parks and other public access. Industrial & Construction accidents: Walking-working surfaces including ramps, hoisting & conveying, powered lifts, work platforms, forklifts, construction vehicles, materials handling & storage, machine guarding, ladders, scaffolding, trenching & shoring, Cal-OSHA compliance, lockout/tagout, IIPP analysis, human factors & ergonomics issues. Products Liability: Liabili...

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Joseph R Travers

Newport Beach, California

Products Liability, Manufacturing - Fitness, Fitness Equipment, Gym, Treadmill, Bicycle, Group Cycle, Spinning, Strength Training, Weight Training, Product Quality, Asia Manufacturing, Human Factors, FMEA, DFMA, Design for Serviceability, Products Liability, Premises Liability, IP Litigation , Patent Litigation

Over 25 years in the fitness equipment and bicycle industries bringing to the table a well-rounded professional perspective. From Mechanical Engineer designing products to head of Product Development & Quality ensuring manufacturing process and sourcing excellence, my expertise covers a wide spectrum of technical disciplines. With experience in technical field service training and being an avid user of fitness and bicycle equipment, I can also relate well with the plaintiff’s side of a product liabilities claim. I have provided testimony and sat as the most knowledgeable defense party on over 65 depositions as well as participated in mediations and litigations in the states of Alabama, Arizona, California, Colorado, Florida, New Jersey, New York, Texas as well as well as internationally in Canada, China, and Hong Kong. During college and after graduation, I was employed as a Mechanical Designer then Mechanical Engineer in the bike industry for Profile Design & Primo Products. I...

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Mohammad Atarod, PhD, PE

Testifying Expert-Accident Recon and Biomechanics

Atarod Biomechanics Laboratories

LAGUNA NIGUEL, California

Biomechanics, Accident Reconstruction - Accident Reconstruction, Biomechanical Analysis of Injury, Premises Liability, Slips/Trips and Falls, Crash Data Retrieval, Heavy Vehicle EDRs, Blackbox Download, Photogrammetry, Computer Simulations, Failure Analysis, Human Factors, Laboratory Testing, 3D Laser Scanning, Expert Witness Testimony

I am a Senior Biomechanical Engineer and Accident Reconstructionist. I am registered as a professional mechanical engineer (PE) in California, Nevada and Colorado. I specialize in accident reconstruction, injury biomechanics and injury mechanism/causation analysis. I works on cases across the country, analyzing injuries in automotive collisions, industrial accidents, workers compensation claims, premises liability claims, slip/trip and falls, and sport/recreation accidents. I have provided litigation support to insurance companies, law firms, and automotive manufacturers/industries over the past 12+ years. Technical Areas of Specialization: - Biomechanical Analysis of Injury - Accident Reconstruction - Premises Liability; Slips/Trips and Falls - Crash Data Retrieval; Heavy Vehicle EDRs - Photogrammetry and 3D Computer Simulations - Vehicle Systems Analysis Services: - Accident Reconstruction - Biomechanical Analysis of Injury - Premises Liability; Slips/Trips and Falls - Crash Dat...

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Jamie Klopp

Transportation Design: Automotive and Aircraft

Klopp US LLC

Encinitas, California

Automotive, Aviation & Aerospace - Automotive Design, Car Design, Aircraft Design, Product Design, Human Factors, Ergonomics, Styling, Interface, Intellectual Property, Patent, Manufacturing, Engineering, FAA, FMVSS, Interior, Exterior, Seats, Utility Patent, Design Patent, Design Process

Jamie Klopp owns and operates Klopp US LLC, an Automotive, Aircraft, and Product Design Expert Witness service. In addition to expert work, Mr. Klopp is an active design professional working in automotive and aerospace product development. Mr. Klopp holds broad design expertise with specific focus on Passenger Automotive Vehicles and Part 23 Fixed-Wing Aircraft and Part 27 Rotorcraft. Jamie Klopp provides litigation graphics services that complement his expert witness work in automotive, aircraft, and product design. He creates 3D animations and renderings for intellectual property cases, including technology tutorials and patent disputes, as well as manufacturing processes, industrial systems, and technical subjects. His work includes visualizations of product defects, engineering failures, design processes, and human factors issues. He also produces 2D trial graphics such as diagrams illustrating design elements, patent claims, manufacturing sequences, and engineering specificati...

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Jose J. Granda, PhD, PE

Cadsim Engineering

Sacramento, California

Accident Reconstruction, Engineering - Mechanical Engineering, Auto Accidents, Accident Biomechanics, EDR download, analysis, including TESLA, Work Place Accidents, Heavy Vehicles, Motorcycles, Pedestrians, Bicycles, Failure Analysis, Computer Models, Simulations, Finite Element Modeling (FEA), Human Factors, Vehicle Dynamics and Design

QUALIFICATIONS; Professor of Mechanical Engineering at the California State University in Sacramento, CA with 39+ yrs. experience. Professional Registered Mechanical Engineer (PE License, CA). An expert in accident reconstruction using computer simulations of accidents involving vehicles, trucks, heavy vehicles, motorcycles, biomechanics, pedestrians, bicycles, occupational, workplace, failure analysis impact forces, industrial accidents. EDR (Event Data Recorder) analysis including TESLA vehicles, patents. EXPERT WITNESS EXPERIENCE: Written reports, depositions & trial experience. SPECIALIZED TRAINING; Vehicle Dynamics and Design, Vehicle Safety & Crash Reconstruction, Accident Biomechanics, Finite Element Modeling in Computer Aided Design, Advanced Mechanical Design and Failure Analysis (CSUS); Motorcycle Accident reconstruction, (Northwestern University); EDR Certification, Tech 1, Tech II, EDR Analysis Certification (Collision Safety Institute); Applying Automotive EDR Da...

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Omair Siddiqui, MSME

Expert in Vehicle Crashes & Black Box Analysis

Los Angeles, California

Accident Reconstruction, Automotive Engineering - Accident Reconstruction, Event Data Recorder (EDR), Blackbox, Simulations, PC-Crash, Pedestrian collision, Collision Analysis, Forensic Engineering, Crash Investigations, Accident Analysis, Vehicle Dynamics, Crash Reconstruction, Accident Simulation, Human Factors, Crash Data Analysis

Additional Training ➢ SAE, Accident Recon, Autonomous Vehicle and ADAS, September 2021 ➢ SAE, Brake Control Systems: ABS, TCS, and ECS, March 2021 ➢ SAE, Driver Distractions, December 2020 ➢ PC-Crash Training Course (Advanced), February 2020 ➢ SAE, Photogrammetry and Analysis of Digital Media, June 2019 ➢ California Motorcyclist Safety Program (CMSP), June 2019 ➢ Human-Vehicle-Environment (HVE) Forum (EDSMAC/EDCRASH Training), February 2019 ➢ SAE, Applied Vehicle Dynamics, December 2018 ➢ SAE, Applying Automotive EDR Data to Traffic Crash Reconstruction, November 2018 ➢ SAE, Side Impact Occupant Safety, November 2018 ➢ SAE, Vehicle Crash Reconstruction: Principles and Technology, August 2018 ➢ Southwestern Association of Technical Accident Investigators (SATAI) Conference, July 2018 ➢ Tesla EDR Training, June 2018 ➢ Collision Safety Institute – Crash Data Retrieval (CDR) Technician Course, June 2018 ➢ I-CAR Collision Repair Course, May-June 2018 ➢ Digital Photography- California Cen...

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Matthew J Hartley, BS, LC, MIES

Nationally Recognized Lighting Expert

Matt Hartley Lighting, LLC

Arvada, Colorado

Engineering, Architecture - Lighting, Illumination, Interior Lighting, Street and Area Lighting, Lighting Survey, Fixture Construction, Lighting Installations, Premises Liability Lighting, Security Lighting, Insufficient Lighting, Accident Investigation Lighting, Human Factors, Slip & Fall, OSHA, Glare, Visibility, Walking and Working Surfaces, Control Systems

Illumination Engineer, consultant, teacher, inventor, forensics investigator, and expert in lighting. My 30+ years of experience has immersed me in different facets of the lighting industry. I have worked for companies that cater to lighting design, lighting equipment manufacturing, 3d modeling lighting software, sales and service including post occupancy evaluation. My design experience includes indoor/outdoor lighting, safety and security, lighting and human health, glare, roadway lighting, sports lighting, and lighting standards. Since 1999, I have been involved with standard writing committees within the Illuminating Engineering Society (IES). For the IES, I served on 13 IES committees, of which was the chair of 7 of those committees producing over 11 standards documents. Teaching has also been a part of my career, instructing diverse groups from high school students to seasoned lighting professionals allowing these individuals to understand the concepts on their level. ...

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Kristopher J. Seluga, M.S., PE

Technology Associates, LLC

Stratford, Connecticut

Accident Reconstruction, Products Liability - Mechanical Engineering, Biomechanics, Automotive, Construction, Engineering, Failure Analysis, Forensic Science, Golf Carts, Human Factors, Motorcycle, Premises Liability, Safety, Slip Trip & Fall

Our staff of experienced engineers are ready to apply established scientific and engineering knowledge and techniques to your case. Our staff has published hundreds of papers, served on national ANSI standards committees and assisted over 2,800 attorneys and insurance agents settle or try their cases. Because the laws of physics and principles of engineering are universal, we are able to investigate and opine on a wide range of topics including motor vehicle crashes, heavy machinery, consumer products, construction sites, falls and biomechanical analyses. In each case, we assist our clients by determining, in as much detail as possible, how and why an accident occurred and communicating those finding in a clear and concise manner.

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Kevin M Alvarez

Chief Pilot · Aviation Expert Witness

AeroVerdict Consulting

New Port Richey, Florida

Aviation & Aerospace, Transportation - Aviation accident, Expert witness, Aviation safety, Corporate aviation, Safety management, Aircraft accident, Flight operations, FAA compliance, Business aviation, Operational analysis, Accident investigation, Pilot error, Aviation risk, Pilot decision making, Part 91 operations, Human factors, Aircraft operations, CRM, Part 135

Kevin M. Alvarez is a corporate aviation Chief Pilot and aviation operations expert specializing in aircraft accident investigation, aviation operational analysis, and business jet flight operations. With more than 5,000 hours operating advanced business aircraft and over a decade leading corporate flight departments, he provides expert analysis regarding aviation accidents, pilot decision-making, FAA regulatory compliance, and aviation safety management. Mr. Alvarez currently serves as Chief Pilot for a Part 91 corporate aviation operation, flying advanced business jets throughout North America, Europe, Canada, Mexico, and the Caribbean. His operational experience includes international flight planning, complex aviation risk management, and the implementation of safety management practices in corporate aviation environments. His analytical methodology is structured to satisfy Daubert reliability requirements, with full methodology documentation and sample report excerpts available...

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Helena K Breuer

Transportation Safety Expert

Forensic Human Factors

Jacksonville Beach, FL, Florida

Traffic Engineering, Transportation - Human factors, Maintence of Traffic, Traffic Control Devices

Accident Reconstructionist in Training (320+ hours) - courses include: At-Scene Traffic Crash/Traffic Homicide Investigation, Advanced Traffic Crash Investigation, Traffic Crash Reconstruction, Crash Data Retrieval (CDR) Data Tool Analyst, Motorcycle Crashes - Level II, Commercial Motor Vehicle Crash Investigation - Level I (IP). Ph.D. in Civil Engineering, Transportation Engineering, where I was an Advancing Sciences in America (ARCS) Scholar and Dwight D. Eisenhower Transportation Fellow (FHWA). During my Ph.D., I worked in a full-scale driving simulator and studied driver behavior (visual attention, stress levels, speed) around their interactions with bicyclists at intersections, user perceptions of bike turnouts, and human interactions with fully autonomous vehicles. I have conducted research for the NCHRP, NHTSA, and Oregon DOT. Subsequently, I have extensive experience with technical correspondence and creating and delivering presentations to panels and technical advisory com...

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Lloyd A Marks, MD, MBS, FACC, FAIMBE

Medical Device Inventions, IP & Commercialization

Medical Invention Consulting, LLC

Tampa, Florida

Medical Devices, Intellectual Property - Medical Devices, Medical Technology, Patents, Intellectual Property, Inventions, Entrepreneurship, Due Diligence, Medical Device Assessment, Medical Device Protection, Medical Device Commercialization, Human Factors, Medical Twechnology Assessment, Medical Technology Protection, Medical Technology Commercialization

I’m an electrical engineer (MIT), physician (University of Michigan), pediatric cardiologist (Johns Hopkins), MBA (UTK), inventor with 20 medical device and 5 sporting equipment patents, and entrepreneur with three startup companies, one of which, MGI Medical, LLC (www.mgimedical.com), is commercializing an invention of mine, the Pulse Flowmeter, which can detect hemodynamically significant occult blood loss well before the blood pressure drops. This is for the management of trauma, post-operative bleeding, battlefield triage, GI bleeders and battlefield injuries). I am a fellow of the American College of Cardiology and the American Institute of Medical and Biological Engineering. Honors include membership in Tau Beta Pi (Engineering Honorary) , membership in Eta Kappa Nu (electrical engineering honorary), a listing in Marquis Who's Who in America and Physician Leader of the year at the Physician's Executive MBA Program at the University of Tennessee, Knoxville. Because of my ba...

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Joseph Manges

Accident Reconstruction

Capture My Crash, LLC

Tampa, Florida

Accident Reconstruction, Trucking - Accident Investigation, Rapid Response, Commercial Vehicle Collisions, Crash Data Retrieval, EDR Downloads, Human Factors, Motorcycle, Pedestrian, Bicyclist, Electric scooters, Simulations, Animations, Infotainment Downloads, ECM Downloads, Nighttime Visibility, Drone pilot, Damage Consistency Evals

Joe is an accident reconstructionist delivering meticulous and comprehensive collision analysis and reconstruction services catering to both passenger and commercial vehicles. Employing state-of-the-art data acquisition systems and advanced analysis tools, I adeptly collect and decipher pivotal data sourced from the scene, EDR black boxes, and other relevant sources. This data enables me to reconstruct the events leading up to the collision with a high level of accuracy and provide a scientifically supported analysis to assist with determining liability and contributory factors. I have investigated and reconstructed hundreds of crashes involving cars, trucks, pedestrians, bicyclists, electric scooters, motorcycles, etc. over the past 20+ years. Defense and Plaintiff cases accepted.

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Keith M. Cianfrani, Ed.D, (abd), MAS, CISM

Aviation Accident Investigator

Aviation Safety Consultants, LLC

The Villages, Florida

Aviation & Aerospace, Accident Reconstruction - Aviation Accident Investigation, Risk Management, Human Factors, Safety Management Systems (SMS), Aviation Safety Auditing, Flight Data Monitoring

Keith M Cianfrani, Ed.D. (abd), MAS, CISM, President/CEO, Aviation Safety Consultants, LLC is a company designed to assist the aviation community with precise and specific safety consulting. Our clients include insurance companies, Part 135 and Part 91 aviation operators, aviation flight schools, aircraft production companies, and law firms. Keith is a retired U.S. Army Lieutenant Colonel, the founder and owner, has over 40 years of aviation experience. He is a master army aviator, aviation safety officer, commercial pilot, instructor pilot and was an accident investigator for the U.S. Army Safety Center. He is rated in both rotary wing and fixed wing aircraft. As a safety officer, Keith has managed safety programs in organizations with over 100 aircraft stationed throughout 5 states. Keith is is an a safety and accident investigation instructor for Embry Riddle Aeronautical University. Keith is a certified Flight Instructor (CFI) and has also worked in the civilian, commercial a...

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Bradley T Cook, PE, MSE, CXLT

Kimley-Horn

Sarasota, Florida

Accident Reconstruction, Biomedical Engineering - Auto Accident, Accident Reconstruction, Biomedical, Biomechanical, Collision Analysis, Crash Data Retrieval, Human Factors, Motorcycle, Occupational Safety, Premises Liability, Product Liability, Slip Trip & Fall

Bradley is a Biomedical and Mechanical engineer with extensive experience in accident reconstruction. Bradley is a licensed professional engineer (PE) in Michigan and Florida. He specializes in vehicular accident reconstruction and has investigated hundreds of vehicle accidents involving cars, trucks, pedestrians, bicyclists, motorcycles, etc. The investigations have involved issues of nighttime visibility, downloading of crash data (black box data), reaction time, and blind spots. He holds a Bachelor of Science in Mechanical Engineering from the University of Michigan and a Masters of Science in Engineering with a concentration in Biomedical from Purdue University. Bradley has co-authored a chapter in Forensic Human Factors and Ergonomics: Case Studies and Analysis and Occupational Health and Safety Management in the Handbook of Human Factors & Ergonomics. He is also currently a committee member of the Underwriters Laboratories (UL) Standards Technical Panel (STP) 2201: Engi...

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John D Lloyd, PhD, CPE, ACTAR

Biomechanics, Human factors & Crash reconstruction

San Antonio, Florida

Motorcycle, Biomechanics - human factors, biomechanic, accident reconstruction, motorcycle accident, motorcycle crash, motorcycle riding, motorcycle handling, motorcycle inspection, motorcycle testing, bicycle, e-bike, scooter, car crash, auto accident, ATV / UTV, brain injury, TBI, helmet, helmet testing, motorcycle helmet

John Lloyd, PhD, CPE, ACTAR is triple board-certified and a distinguished authority in motorcycle accident reconstruction, injury biomechanics and human factors, with 30+ years of testifying experience. As a motorcyclist with over 40 years of riding experience and advanced training, his in-depth understanding of the dynamics involved in motorcycle crashes distinguishes him as a true specialist in the field. Dr. Lloyd has been qualified to provide biomechanical analyses of various incidents, including: . Motorcycle Accident Reconstruction - Motorcycle riding . Injury Biomechanics . Human Factors . Motorcycle handling and operation . Motorcycle inspection and testing . Motorcycle helmets . Biomechanics of Head and Brain Injury . Football and sports helmets . Automobile accidents . Truck accidents Dr. Lloyd earned a Ph.D. in Ergonomics (Human Factors Engineering) with a specialization in biomechanics from Loughborough University in England. He has been board certified through the Bo...

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Daniel J. Hartwig, CSP, CIH

Safety, Human Factors, Industrial Hygiene

General Health & Safety Services LLC

Punta Gorda, Florida

Safety, Premises Liability - Slip & Fall, Personal Injury, Speed Bumps, Stairs, Chemical Exposure, Noise, Product Liability, Machine Safety, Human Factors, Indoor Air Quality, Industrial Hygiene, Mold, Warnings, Construction, Trip & Fall, Best Practice

Daniel Hartwig, CSP, CIH is President of General Health & Safety Services LLC. and has provided safety counsel and expert witness testimony throughout the United States for since 1978 from offices in Wisconsin and Florida. Because of the wide variety of clients served, he has experience in many environments including retail stores, hotels, homes, restaurants, manufacturing facilities, construction sites, hospitals and nursing homes, auto dealerships and many more. Being a premises safety expert, Mr. Hartwig performs investigations related to construction, operation, and maintenance of commercial premises, residential structures, and industrial facilities. The investigations involve site inspections and review of applicable standards. Based on the above information and review of the discovery material, he performs a root cause analysis of the accident, enabling him to provide a strong basis for his opinions. For product liability cases, he provides analysis of possible defects, wa...

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Mohammad Atarod, PhD, PE

Testifying Expert-Accident Recon and Biomechanics

Atarod Biomechanics Laboratories

Hawaii

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Lee T Ostrom, Ph.D., CSP, CPE, CTM

Human Factors, Ergonomics, and Safety Expert

Sole Proprietor

Idaho Falls, Idaho

Safety, Ergonomics - Human Factors, Risk Assessment, Product Safety, Slips/Falls, Complex environments, Workplace Design, Procedures, Maintenance, inspection

CV Lists my current cases. Below are a sample. 2025-Present-Valerie Walker on behalf of her deceased son Anthony v the City of New Orleans, Partners, LLC and L&R Security Services, Inc. This case involves access to the abandoned Market Street Power Plant by a group of urban explorers and the death of Anthony. CORE vs PSCo - May 2022 till November 2023 - Breached Contract and Negligence. I provided human factors/industrial safety support to plaintiff’s counsel. The jury said when interviewed that the human factors testimony I provided helped to persuade their decision. A synopsis of the lawsuit is below: On Oct. 25, a Denver district court jury found in favor of CORE in its lawsuit against Public Service Company of Colorado, a subsidiary of Xcel Energy Inc. (Xcel), regarding the mismanagement of the Comanche Unit 3 coal-fired power plant. CORE was awarded $26.45 million for lengthy outages on 2020 and 2022 caused by Xcel’s imprudent operations and negligence. 2022-Employee in...

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Adam K Aleksander, PhD, PE, CSP

Aleksander & Associates P.A.

Boise, Idaho

Human Factors, Products Liability - Mechanical, Industrial, Safety Engineering, Forensic Engineering, Human Factors, Product Liability, Warnings, Labels, Defects, Visibility, Reconstruction, Failure Analysis, OSHA, Construction, Equipment Failures, Industrial Accidents, Power Utility Accidents, Insurance Claims, Photogrammetry

Dr. Aleksander has a diversified Engineering background with specific experience (50 years) in Manufacturing, Cost Analysis, Consulting Engineering, Engineering Sales, Project Management, Product Development, Research, Lecturing, and Technical / Litigation Forensic Engineering Investigations of accidents and equipment failures. He has worked extensively in heavy industry (conveyors, biomass boilers, electric utilities) as well as the Forensic Engineering practice. Dr. Aleksander was the founding chair of the ASTM committee E58 on Forensic Engineering. He worked overseas on some 40 occasions in multiple South East Asia locations, and was involved in innovative efforts in international plastics mitigation. His academic credentials (Ph.D. Human Factors and Safety Engineering) bring a solid foundation to issues regarding product liability, warnings, labels, and use, based on a decades of development and research, and standards. This training also compliments Dr. Aleksander's experience...

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Elliott B Lushin

USMC F/A-18 & A-10 Pilot – Aviation Safety Expert

Lushin Aviation Safety & Consulting LLC

Columbus, Indiana

Aviation & Aerospace, Human Factors - Pilot Error, Flight Training & Instruction, International Airline Operations, Human Factors, Crew Resource Management (CRM), Aeronautical Decision Making, Safety Management Systems (SMS), Aviation Safety, Military Aviation Operations, Airline Operations, Aviation Maintenance & Safety Programs

Elliott Lushin is a highly experienced aviation professional offering expert witness and consulting services in pilot performance, human factors, aeronautical decision-making, crew resource management, airline operations, flight training standards, and aviation safety program effectiveness. He brings a rare combination of high-performance military fighter pilot experience, hands-on aviation maintenance and safety program leadership, and major airline domestic narrowbody international widebody operations. In addition, Elliott has significant experience leading organizational excellence and leadership development programs for companies of all sizes, giving him unique insight into how leadership decisions, organizational culture, and systemic blind spots impact safety and operational performance. Attorneys value his ability to provide clear, credible analysis grounded in real-world operational and safety leadership experience. CIVIL ATP: MEL (A-350, A-320 family, B-757/767, DC-9/MD-88,...

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Martin Moore-Ede, M.D., Ph.D.

Sleep, Fatigue & Human Performance Expert

Circadian Expert Services

Stoneham, Massachusetts

Transportation, Human Factors - Driver Fatigue, Fatigue Impairment, Human Fatigue, Accident Invesitgation, Human Factors, Operator Fatigue, Driver Alertness, Circadian Rhythms, Sleep Deprivation, Drowsy Driving, Fatigue Risk Management, Chronobiology, Truck Accidents, Motor Vehicle Accidents, Rail Accidents, Marine Accidents, Circadian Rhythms, Shift Work

Dr. Martin Moore-Ede is an internationally recognized authority on sleep, fatigue, circadian rhythms, human performance, occupational safety, and fatigue risk management. He is the Founder and Chairman of Circadian® and Circadian Expert Services and has spent more than four decades helping organizations understand and mitigate the effects of sleep loss, fatigue, and circadian disruption on safety, health, and operational performance. A physician and physiologist, Dr. Moore-Ede earned his medical degree from the University of London and his Ph.D. in Physiology from Harvard University, where he later served on the faculty of Harvard Medical School as Associate Professor of Physiology. He is widely recognized for pioneering research into the biological clock and the impact of fatigue and sleep disruption on human behavior, cognition, decision-making, and safety. Dr. Moore-Ede has directed more than 100 research studies and over 300 consulting projects involving sleep, fatigue, shift ...

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Fred W. Turek, Ph.D.

Circadian & Fatigue Expert - Northwestern Univ.

Circadian

Stoneham, Massachusetts

Transportation, Human Factors - Driver Fatigue, Fatigue Impairment, Human Fatigue, Accident Investigation, Human Factors, Operator Fatigue, Driver Alertness, Circadian Rhythms, Sleep Deprivation, Drowsy Driving, Fatigue Risk Management, Chronobiology, Truck Accidents, Motor Vehicle Accidents, Rail Accidents, Marine Accidents

Dr. Fred W. Turek is an internationally recognized authority on sleep, circadian rhythms, fatigue, shift work, and human performance. He is the Charles E. and Emma H. Morrison Professor of Biology at Northwestern University and Founder and Director of Northwestern University's Center for Sleep and Circadian Biology, one of the world's leading research centers in the field. For more than 40 years, Dr. Turek has conducted pioneering research on the biological mechanisms that regulate sleep, alertness, fatigue, cognition, performance, and health. He is widely recognized for his role in the discovery of the first mammalian CLOCK gene, a landmark breakthrough that transformed modern circadian biology. He is also a co-inventor on multiple U.S. patents related to sleep and circadian regulation. Dr. Turek founded and served as the first President of the Society for Research on Biological Rhythms and has held leadership positions with the Sleep Research Society and numerous scientific jour...

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James M. Miller, PE, PhD

Engineering Safety, Agricultural, Batteries, Nano

J.M. Miller Engineering, Inc.

Ann Arbor, Michigan

Safety, Agriculture Engineering - Accidents, Auto ADAS, Agriculture, Battery Fires, Cannabis Processing, Chemical Exposure, Child Safety, Construction, Electrocution, Ergonomics, Fitness Equipment, Fires/Explosions, HazCom, Human Factors, HVAC, Mechatronics/Nano, Medical Devices, OSHA, Recalls, RV/ATV

There are four PhD and registered Professional Engineers at Miller Engineering who are celebrating 40 years of Professorships at three universities along with providing services to Government, Insurance, and Industry—through research, publications, presentations, and expert testimony. These co-founders and associates are James M. Miller, PE, PhD; Mark R. Lehto, PhD; David R. Clark, PE, PhD; Adam M. Olshove, PE, MSE; and Jeffrey D. Rupp, MSE. Miller Engineering has a dedicated office with a full-time staff of engineers, researchers, and technical writers. The span of our collective academic and experiential expertise includes the Mechanical, Electrical, Chemical, Agricultural, Industrial, Human Factors, Ergonomic and Safety fields of engineering. Miller Engineering’s principle engineers wrote the original books on warnings and instructions, have published in several other areas, have participated in product designs and patents, and have analyzed, reconstructed and/or animated numerou...

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Mark R. Lehto, PhD

Ergonomics, Chemicals, Artificial Intelligence

J.M. Miller Engineering, Inc.

Ann Arbor, Michigan

Warnings & Labels, Ergonomics - Accident Investigation, Ergonomics, Boating Safety, Accident Modeling, Aquatics, Human Factors, Marine Accident, Instructions, Chemicals, Labels & Warnings, Restraint System, Effectiveness, Child Safety, Safety Equipment, Machine Learning, Consumer Product, Slip Trip & Fall, Artificial Intelligence

There are four PhD and registered Professional Engineers at Miller Engineering who are celebrating 40 years of Professorships at three universities along with providing services to Government, Insurance, and Industry - through research, publications, presentations, and expert testimony. These co-founders and associates are James M. Miller, PE, PhD; Mark R. Lehto, PhD; James M.L. Miller, MS, PhD, EIT; Adam M. Olshove, PE, MSE; and Jeffrey D. Rupp, MSE. Miller Engineering has a dedicated office with a full-time staff of engineers, researchers, and technical writers. The span of our collective academic and experiential expertise includes the Mechanical, Electrical, Chemical, Agricultural, Industrial, Human Factors, Ergonomic and Safety fields of engineering. Miller Engineering also designs and operates hydroelectric and solar energy sources within their agricultural, forestry, marine, and cattle subsidiary operations in Idaho and Oregon, lending to unique hand-on expertise in these a...

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Jon (Mike) M Kramer, MD, MBA

Sr. Physician Leader in Safety and Health Records

Health Value Leadership, LLC

Montague, Michigan

Safety, Information Technology - quality, safety, informatics, Epic, EMR, EHR, physician, culture, high reliability, administration, Electronic records, records, human factors, decision support, laboratory, inbasket

Dr. Kramer has previously held roles including Chief Medical Information Officer and Chief Quality and Safety Officer. Dr. Kramer practiced Internal Medicine and Pediatrics while developing his senior administrative leadership career. Dr. Kramer's leadership includes 25+ years of experience in implementing and maintaining electronic health records, developing systemwide workflows, standards of practice, and outcomes measurement. Expertise includes quality, safety, human factors, and workflow design that result in quality and safety outcomes. At these organizations, Dr. Kramer led the informatics teams and regularly evaluated patient safety, adverse events, and implemented systems and processes to reduce risk. This included policies, training, cultural change, and communications. Formerly CMIO for major health systems including University of Michigan, Trinity Health, Corewell West (Spectrum Health), OhioHealth and Inova Health. Senior most leader in those organizations resp...

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Daniel S Holmes

Eagle Lake, Minnesota

Accident Reconstruction - Accident investigation, accident reconstruction, air bag, CDR, EDR, time distance, speed, vehicle inspection, bicycle, commercial vehicle, motorcycle crash, pedestrian, scene photography, aerial photography, drone, occupant kinematics, human factors, sight lines, vehicle equipment, tire failure

My name is Daniel Holmes and I am retired from the Minnesota State Patrol with nearly 27 years of experience. While working for the Minnesota State Patrol I reconstructed over 170 serious or fatal crashes. I have also investigated over 1,500 motor vehicle crashes that did not rise to the level of requiring a crash reconstruction. In 2015, I was awarded the Minnesota State Patrol Award of Excellence in Crash Reconstruction for my work. I am A.C.T.A.R. ( National Accreditation Commission for Traffic Accident Reconstruction) certified. I am trained as a C.D.R. ( Crash Data Recorder) analyst-technician and have the ability to image and analyze the airbag data from supported vehicles. I am a Forensic Mapper and drone operator. I have the ability to generate scaled diagrams from a crash scene or use mapping data obtained from Law Enforcement. I am also trained in Occupant Kinematics, and have reconstructed several pedestrian/bicycle accidents along with commercial vehicle crashes....

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Christopher E. Janson, MS, CSP, CHMM

Haines, Janson & Associates LLC

St. Louis, Missouri

Safety, Premises Liability - Slip Trip & Fall, Retail Safety, Equipment & Machinery, Human Factors, Slip Resistance, Accident Investigation/Reconstruction, OSHA, Guarding, Failure Analysis, Construction, Industrial & Premises Accidents

Haines, Janson & Associates provides safety and risk management consulting services. Christopher E. Janson, Board Certified Safety Professional (CSP); Certified Hazardous Materials Manager (CHMM); Certified User of the English XL slip resistance measuring device (CXLT). Mr. Janson has held safety management positions with several Fortune 500 companies. He has also worked with a variety of firms as a consultant for the insurance industry. Mr. Janson is a professional member of the American Society of Safety Engineers.

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Mohammad Atarod, PhD, PE

Testifying Expert-Accident Recon and Biomechanics

Atarod Biomechanics Laboratories

Nevada

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Eric R. Anderson

Motorcycle, Powersports, Scooter, Offroad Expert

Motorcycle Forensics Expert (.com)

Carson City, Nevada

Transportation, Motorcycle - human factors, street motorcycles, motorcycle racing, motocross racing, trail riding, dirt bikes, adventure motorcycling , UTVs/ATVs, Vehicle Inspection, Motorcycle Safety Foundation Rider Coach, Recreational Off-Highway Vehicle Association Coach, collision avoidance, e-scooters, motorcycle helmets , off-highway vehicles

As a powersports businessman, protective helmet/apparel manufacturer and rider for more than 50 years, Eric Anderson has built a vast base of knowledge related to motorcycles, ATVs, UTVs, scooters, micro-mobility vehicles, and off-road vehicles. He has been an MSF certified Rider coach as well as a ROHVA certified Driver Coach. He began working with the Motorcycle Industry Council (MIC) and Motorcycle Safety Foundation (MSF) in the early 1980s before entering the business side of powersports building and marketing protective apparel and helmets. Later in the 2000s, he became an elected Board member to the MIC 10 times for a total of 20 years of experience directing the industry from the highest levels. Founding Scorpion Sports with its associated ScorpionExo brand of helmets and protective apparel was an industry success story touted by trade magazines and thousands of dealers who recognized the disruptive marketing, unique distribution channel and price viability of the fast-growin...

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Kristopher J. Seluga, M.S., PE

Technology Associates, LLC

New York

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C.J. Abraham, PhD, P.E., DPE, JD, FRSC, FTI, DEE, IH

Great Neck, New York

Products Liability, Slip Trip & Fall - Athletics & Recreation, Safety, Safety Engineering, Warnings & Labels, Industrial Hygiene, OSHA, Risk Analysis, Biomechanics, Engineering, Fires, Explosions, Human Factors, Brain Injuries, Personal Injury, Trampolines, Amusement Parks, Water Parks, Playground Accidents

Dr. Abraham is a licensed P.E. and a Senior Member and a Diplomat in The National Academy of Forensic Engineers. Over the last 45 years, C. J. Abraham has created warnings and instructions for many products and protocols applied and used worldwide. He has consulted to major news channels, NHTSA, OSHA, NIOSH, State of California (CaITrans), Microsoft, New York Transit, Queensborough Bridge Authority, Department of Agriculture, the Federal Government, State Attorney General's Offices, and municipalities throughout the United States, Canada and Europe in a variety of technical areas. His interests include head and brain protection in sports and recreation and personal injury accidents and litigations. In addition, he is also involved in the reconstruction of all types of sports injuries in a large variety of recreational and sports activities, amusement and trampoline facilities, as well as accidents involving a variety of products and vehicles. His background may be found at www...

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Caroline A Strazis

Expert Causality Analyst; Hospital Sentinel Harm

CA Strazis Clinical Legal Consulting, PLLC

Durham, North Carolina

Radiology, Legal Nurse Consulting - Root Cause Analysis, Clinical Decisions, Human Factors, Healthcare Systems/Operations, Unexpected Death, Diagnostic Error/Delay, VTE Prophylaxis, Fall with Injury, Central Venous/Vascular Access, Cardiac/Physiologic Monitoring, Moderate Sedation, Procedural Error/Complication, Resuscitation, Failure to Escalate/Rescue

Caroline A. Strazis, MSN, RN, CNL, CPPS Masters in Science of Nursing, Healthcare Systems (MSN) - University of North Carolina at Chapel Hill Registered Nurse (RN) - North Carolina Board of Nursing Clinical Nurse Leader (CNL) - American Association of Colleges of Nursing Certified Professional of Patient Safety (CPPS) - Institute for Healthcare Improvement CA Strazis Clinical Legal Consulting, PLLC I am a clinical-legal consultant and registered nurse with 12 years of experience spanning high-acuity clinical work and investigative experience. I specialize end-to-end management of complex investigations with speed and precision and am comfortable delivering highly visible findings under sustained executive, legal, and regulatory scrutiny. I am formally trained and certified to perform full causal analysis on events ranging from geriatric falls with injury to catastrophic harm and unexpected death. Root cause analysis is a core discipline within systems science and is setting-agno...

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Helen Zienkievicz, APRN-CNP

Airline Cabin & Ground Safety Expert & Consultant

Cabin Safety Consultants

Moore, Oklahoma

Aviation & Aerospace, Safety - Air Carrier Access Act, Flight Attendant Emergency Procedures, Safety Investigator, Medical incidents and injury, Complaint Resolution Official, Pilot Emergency Training, Passenger De-escalation, Regulatory Compliance, Threat Error Management, Safety Management Systems, Human Factors, Industry Standards & Practices

Expert witness, consultant, program developer, trainer and internationally recognized speaker on commercial airline flight attendant and gate personnel training, performance, safety, industry standards and FAA regulatory compliance. More than 40 years of experience in the commercial aviation industry; holding such positions as: Manager of Health, Safety and Security for Inflight Division, Senior Inflight Safety Investigator, Emergency Procedures Instructor for pilots and flight attendants, Station Manager, flight attendant and customer service supervisor. Other aviation roles included Chairperson of an FAA supported Aviation Safety Action Program for flight attendants, member of the Air Transport Association (A4A) Cabin Operations Committee and co-developer of Passenger Incident Review Committee process for addressing passenger misconduct incidents on a major global airline. Has provided expert witness, consultation services, reports and testimony for both plaintiff and defense case...

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Gavan Dunleavy, Capt.

Unlimited 1st Class Pilot / Maritime Operations

Yardley, Pennsylvania

Maritime, Safety - Shiphandling, Maritime Incident Analysis, Shipyard Safety, Tugboat Operations, Harbor Pilot, Human Factors, Confined Space Entry, Maritime Safety, Maritime Procedures, Ship Repair Operations, Vessel Operations, Hazardous Liquid Cargo, Maritime Technology, Navigational Safety, Tank Vessel Operations, Maritime Training

Capt. Gavan Dunleavy is an active Delaware River docking pilot, maritime consultant, and former U.S. merchant seafarer with over a decade of operational experience involving tanker operations, ship handling, tug/barge operations, and the transportation of crude oil, refined petroleum products, and chemicals. As a harbor docking pilot he conducts docking and undocking operations involving large ocean going vessels including Aframax and Suezmax tankers up to approximately 200,000 deadweight tons, large containerships, bulk carriers, and chemical carriers. His background includes extensive experience in harbor maneuvering, docking operations, Z-Drive tugboat operations, marine casualty analysis, shipyard repair, confined space safety, pollution prevention and vessel operational safety. In addition to active pilotage duties, Capt. Dunleavy provides maritime consulting and expert witness services involving vessel operations, maritime safety practices, ship handling, tug/ship interaction...

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Linda van Roosmalen, PhD

Wheelchair transportation and device safety expert

LINC Design LLC

Gibsonia, Pennsylvania

Transportation, Industrial Design - wheelchair transportation, human factors, public transit, railcar boarding, accessible air travel, wheelchair securement, wheelchair restraint, seatbelt, crash safety, ergonomics, accessibility, paratransit, wheelchair lift, medical device, ramp, school bus, walker safety, warnings, usability, ADA

Dr. Linda van Roosmalen brings over 25 years of experience in wheelchair transportation safety as a designer and researcher at the University of Pittsburgh. She is a key member of a select group of experts dedicated to researching Wheelchair Transportation Safety. Over the past two decades, Dr. van Roosmalen has been retained by both plaintiff and defendant councils, providing her expertise in various cases, including: • Wheelchair transport safety on school buses, public buses, paratransit, non-emergency transport, private vehicles, rail systems, and airplanes. • Lift and ramp access. • Securement of wheelchairs and scooters, along with associated labeling. • Seat belt restraints for wheelchair-seated occupants and related labeling. • Accessibility for wheelchair users in various environments, such as sidewalks, crosswalks, bathrooms, amusement parks, and public vehicles. With a strong background in Industrial Design Engineering and a decade of industry experience, Dr. van Roosmal...

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Ellen Szubski, M.S., Ph.D., CXLT, CPSI, AHFP

Human Factors Expert Witness-Consultant

The Warren Group, Inc.

Irmo, South Carolina

Human Factors, Premises Liability - Accident Prevention, Risk Management, Illumination, Conspicuity, Visual Perception, Slip resistance, Playground Safety, Premises Liability, Lighting, Line of Sight, Driver Distraction, Roadway Markings, Environmental Conditions, Slip-Trip- Fall Evaluations, Workplace Injuries, Human Factors, OSHA

Ellen Szubski, Ph.D., is the senior human factors consultant at The Warren Group. She earned a Doctor of Philosophy in Human Factors Psychology and a Master of Science in Applied Psychology from Clemson University. Ellen is also a Certified XL Tribometrist, a Certified Playground Safety Inspector (CPSI), and a Certified Associate Human Factors Professional (AHFP). Ellen worked in the Clemson Visual Perception and Performance Laboratory examining the factors contributing to the conspicuity of pedestrians and bicyclists in challenging road conditions, such as nighttime driving. She did her dissertation on “The Influence of Pedestrian Biological Motion on Time-To-Collision Estimates at Night”. Prior to entering the forensic field, Ellen planned and conducted experiments for a major bicycle manufacturer that improved bicycle conspicuity. She also conducted laser strike perception and performance studies for the Department of Defense. Ellen applies her experience in Human Factors t...

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Jahan Rasty, PhD, PE, MBA

Real-World Forensic Engineering, LLC

Lubbock, Texas

Engineering, Metallurgy - Failure Analysis, Accident Reconstruction, Slip trip & fall, Trip & Fall, Products Liability, Human Factors, Intellectual Property, Forensic Science, Fire, Equipment & Machinery, Electricity, Biomechanics, Premises Liability

Jahan Rasty, PhD, PE, MBA is a tenured full professor of Mechanical Engineering at Texas Tech University (since 1988) where he also serves as the Director of newly established post-graduate Forensic Engineering Certificate Program, as well as the director of Materials Performance Characterization and Failure Analysis Laboratory. Dr. Rasty is also the founding president of Real-World Forensic Engineering, LLC, which is a boutique-style engineering consulting firm. He is an experienced engineering expert and has successfully testified in more than 250 cases and has conducted over 1,000 engineering investigations in the areas of consumer products and industrial machinery failures involving design, manufacturing and marketing defect issues. Professor Rasty is a licensed professional engineer in the state of Texas, and holds various forensic certifications in the fields of fire and explosion investigation (CFEI, CFII), as well as vehicle Crash Data Retrieval (CDR). He received his BS,...

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Timothy V Ewell

Aviation Accident Investigator | Expert Witness

CONROE, Texas

Aviation & Aerospace, Motorcycle - Aircraft Accident, Aircraft Incident, Pilot Error, Mechanical Failure, Aviation Maintenance, Challenger , Corporate Jet Accidents, King Air, Director of Operations, Chief Pilot, NTSB, General Aviation, Part 135, Human Factors, Accident Reconstruction, Fleet Maintenance, Aircraft Accident Investigation, Test Pilot, Hawker, Cessna

Timothy (Tim) Ewell is a highly credentialed aviation expert witness and lead aircraft accident investigator with over 17,350 total flight hours, including 10,400 hours in Challenger series corporate jets (CL601/604/605/650 and Fusion), 2,550 hours in Hawker HS-125 series, and extensive King Air and other turboprop time. Several thousand in a myriad of smaller single engine aircraft. He holds an FAA Airline Transport Pilot certificate with type ratings on multiple Challenger models and the Hawker 800/850XP, along with current medical and international certifications. Mr. Ewell has served as Director of Operations and FAA-designated Check Airman , Chief Pilot, Director of Marketing, and Maintenance Director, managing flight departments and large fleets (including 10+ aircraft Part 135 certificate holders). A former U.S. Army Captain (Infantry/Aviation specialty, test pilot, and pilot for the White House and the Pentagon), he also owned and operated a commuter airline in Alaska, a Fix...

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Bryan Netherland, MS, MBA, CSP, CSHO, ARM

Safety Expert Witness-OSHA, LOTO, Machine Guarding

Seek Safety Consulting

Austin, Texas

Safety, OSHA - Risk Management, Root Cause Analysis, Lock Out Tag Out, LOTO, Machine Guarding, Forklift, Ergonomics, Amputation, Human Factors, Laceration, Accident Investigation, Emergency Response, Industrial Manufacturing Safety, Fall Protection, Workplace Injuries, Robotics, Automation

Bryan S. Netherland, MS, MBA, CSP, CSHO, is a trained expert witness specializing in OSHA compliance, workplace safety, and accident investigation. He brings over 15 years of leadership experience in Environmental Health & Safety across Fortune 500 and global manufacturing companies, including Amazon, Berry Global, and Aurora Material Solutions. Mr. Netherland has directed enterprise-level OSHA compliance strategies and conducted hundreds of incident investigations. He holds dual graduate degrees, a Master of Science in Occupational Safety & Health and an MBA in Sustainable Business, and is a Certified Safety Professional (CSP) and Certified Safety & Health Official (CSHO). His areas of expertise include high-hazard program management (Lockout/Tagout, confined space, machine guarding, arc flash/NFPA 70E, respiratory protection, powered industrial trucks), policy creation, risk assessment, safety management systems, and organizational safety culture. In addition, Mr. Netherland ser...

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Deborah E Dickerson, PhD CIH CSP

Product warnings, labels, instructions

Dickerson Consulting LLC

Blacksburg, Virginia

Products Liability, Warnings & Labels - Injury, Illness, Product Liability, Premises Liability, Industrial Accidents, Warnings and Labels, OSHA, Worker's Compensation, Human Factors, Safe Equipment Design, Respiratory Protection, Respiratory Illness, Chemical Exposures, Dust, Asbestos, Silica, Lead, Temperature Extremes, Laboratory Safety

Expertise in: product design and safety; design of product warnings and labels; chemical exposure risks, analysis, and health outcomes; industrial system design, safety, and training. I am an associate professor of safety engineering and human factors engineering and the Director of the Product and System Safety Laboratory in the Grado Department of Industrial and Systems Engineering at Virginia Tech in Blacksburg, VA. I hold MS and PhD degrees in safety engineering and the certified safety professional (CSP), certified industrial hygienist (CIH), and certified hazardous materials manager (CHMM) credentials. I have over 30 years of experience in the fields of industrial hygiene and safety engineering: conducting investigations and designing safe work systems. I led a compliance organization responsible for conducting investigations and ensuring compliance with safety and health standards (OSHA and EPA). I have 21 years of university teaching experience and have taugh...

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Jocelyn S Mamchur, PE

RRFB & Pedestrian Safety Expert

Mountlake Terrace, Washington

Traffic Engineering, Transportation - Rapid Rectangular Flashing Beacon (RRFB), pedestrian safety, crosswalk expert, traffic signals, municipal engineering, standard of care, roadway lighting, ADA compliance, beacon failure, signal maintenance, traffic control devices, public agency liability, human factors, sight distance, MUTCD, pedestrian visibility

Jocelyn Mamchur, PE is a civil engineer with over 20 years of experience in municipal infrastructure design and operations. Her professional background includes roadway design, pedestrian facilities, traffic signals, roadway lighting, underground utilities, and ADA compliance within a large public agency environment. Ms. Mamchur specializes in pedestrian safety systems, including Rapid Rectangular Flashing Beacons (RRFBs) and other pedestrian warning devices. Her expertise includes system design, placement, power and detection systems, visibility and conspicuity, inspection protocols, maintenance practices, and operational performance. She routinely evaluates issues involving partial system failures, device outages, sight distance, driver yielding behavior, and agency response to reported malfunctions. She provides standard-of-care analysis for matters involving public agencies and consulting engineers, with a focus on real-world municipal practices, staffing constraints, document...