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Physical Security Expert Witnesses

Physical security 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 physical security. The physical security expert witness listings on this page are typically from fields/areas of expertise such as: Education & Schools, Fire, Jails & Prisons, Law Enf & Criminal Justice, Police Practices & Procedures, Premises Liability, Safety, School Safety, and Security.

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Michelle L Chace, MSSM

Security/Premise Liability 20+ years experience

Mitigation Assessor, LLC

DAYTONA BEACH, Florida

Security, Premises Liability - Premises Liability, Security Negligence, CPTED, Security Procedures, Security Master Plans, Physical Security, Mitigation Assessment, Mitigation Planning, Emergency Management, Electronic Security Design, Threat Assessment, Security Policies, Incident Reporting, Security Training, Risk Assessment, Security Standards

Michelle L. Chace is a physical security subject matter expert and forensic expert witness with more than 20 years of professional experience in physical security, threat/vulnerability/risk assessment, premises liability, and negligent security analysis. Her expertise includes the evaluation of alleged security failures and the application of generally accepted security principles, methodologies, and industry standards. Ms. Chace currently serves as a Subject Matter Expert with Kolins Security Group, where she conducts comprehensive security assessments involving document review, stakeholder interviews, and on-site inspections. Her forensic work includes the review and analysis of incidents involving alleged security deficiencies, the preparation of expert reports, and testimony in depositions and court proceedings related to premises liability and negligent security matters. Ms. Chace has held senior security consulting and project management roles with nationally recognized firms,...

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Elizabeth J Dumbaugh, CPP

Major, US Army Reserve-Premises Liability Expert

THG Consultants

Sarasota, Florida

Security, Premises Liability - Apartment Security, Parking Lots, Parking Garages, Terrorism, Bars/Lounges/Nightclubs, Security Guards, Transportation Security, Hotel Security, Security Management, Violent Crimes, Inadequate/Negligent Security, Special Event Security, Workplace Violence, Policy & Procedures, Physical Security

Elizabeth Dumbaugh, CPP, is a premises liability and security consultant and testifying expert for THG Consultants, a firm whose consultants have conducted more than 1400 forensic evaluations of premises located in 46 states as well as in Puerto Rico, the Virgin Islands, Columbia, South America and Istanbul, Turkey. Elizabeth consults regarding security and safety aspects of commercial property management and conducts security audits for various types of commercial premises, including but not limited to: multi-family housing, resorts, hotels, retail and office space, nightclubs, and convenience stores. She is board-certified in security management, having earned the prestigious designation of Certified Protection Professional (CPP) from ASIS International, where she serves on the ASIS Leadership and Management Practices Council providing global security best practices to ASIS members. She is a Crime Prevention Practitioner, a designation awarded by the Florida Attorney General’s ...

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Frank A Finley, II, PSP

A Proven Security & Premises Liability Expert

PANAMA CITY BEACH, Florida

Premises Liability, Security - workplace violence, healthcare security, physical security, church security, security design, resort security, manufacturing security, mental health security, veterans affairs, inadequate/negligent security, premises security, assault, murder, rape, robbery, violent crime, premises security liability, security, standard of care

Frank is a retired US Army Lieutenant Colonel with 32 years of service, as started, grew, and recently sold a multimillion dollar security consulting firm. He is a physical security and risk mitigation subject matter expert with 30 years of experience, having assisted Federal, state, local, private sector officials, as well as facility owners and operators to enhance their physical security posture. He works with organizations to address their demanding security needs, translating vulnerabilities into compelling security and operations efficiencies. Being completely versed in numerous national and international physical security design guidelines and standards, Frank serves as an advisor to AE design teams in the proper risk assessment and cost-effective implementation of risk mitigation measures. Clients include the Department of Veterans Affairs, Department of the Interior, Department of Defense, several Universities, Fortune 500 manufacturers, hospitality organizations, and nume...

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Joshua C Shelton, CPP, CTM

Workplace Violence Focus

Group Nine Risk Consulting

Peachtree City, Georgia

Security, Premises Liability - Security, Premises Liability, Threat Assessment, Active-Shooter, Inadequate & Negligent Security, Workplace Violence, Security Management, Security Guards, Gas Station, Apartment, Parking Garage, ASIS, Physical Security, Asset Protection, Part 107, Investigations, WPV, SHRM, Photogrammetry, drone

Josh is a senior consultant at Group Nine Risk Consulting and a seasoned professional with over 20 years of career experience in corporate security and law enforcement. Josh is board certified in Security Management, having earned the Certified Protection Professional (CPP) certification through ASIS International. Globally recognized as the standard of excellence for security management professionals, the CPP demonstrates one’s knowledge and competency in seven key domains of security: Security Principles and Practices, Business Principles and Practices, Investigations, Personnel Security, Physical Security, Information Security, and Crisis Management. In addition to his security expertise, Josh is a Part 107 licensed drone pilot, specializing in 3D scene modeling and photogrammetry services. His advanced aerial imaging capabilities provide critical support for forensic investigations, security assessments, and accident reconstruction. Josh is also a Certified Threat Manager (CTM...

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Stephen Dudak, CPP, CPD

Security and Premises Liability

Manchester, Iowa

Premises Liability, Security - workplace violence prevention, security risk management, threat assessment, active shooter awareness, Physical Security, Crime Prevention Through Environmental Design

Steve is a senior consultant at Group Nine Risk Consulting and an experienced professional with 30 years of career experience in security and law enforcement. Steve is board certified in Security Management, holding a Certified Protection Professional (CPP) certification through ASIS International and holds a Crime Prevention Through Environmental Design Professional Designation (CPD) through the National Institute of Crime Prevention. Steve holds a current Workplace Violence Instructor certification through the Center For Personal Protection and Safety (CPPS). Steve is an active member in ASIS, U.S. CPTED Association, International Association of Professional Security Consultants, InfraGard, and the American Crime Prevention Institute. Steve is a retired State Trooper and served for 23 years with the Iowa Department of Public Safety. He served in numerous specialty assignments and duties throughout his career including hostage crisis negotiations, firearms instruction, and K-9 h...

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Michael D. Reiner, CPP, SPIPC

Security Expert - Military & Higher Ed Experience

Group Nine Risk Consulting

Omaha, Nebraska

Security, Premises Liability - Security Negligence, Physical Security, Military Installation Security, Higher Education Campus Security, School Safety, Active Assailant Response, Apartment Complex Security, Commercial Premises Security, Antiterrorism, Emergency Preparedness, Risk Management, Security Training, Video Surveillance, Security Technology

Mike is a senior consultant with Group Nine Risk Consulting, a firm specializing in security risk management, forensic consulting, and security training. He joined Group Nine Risk Consulting following a long and successful military career that spanned over 25 years, followed by 8 years leading the campus safety and security operations of Creighton University. Mike served as a Security Forces officer in the U.S. Air Force, retiring as a colonel. During his career, he gained deep experience in physical security, law enforcement, and emergency management. In his final assignment, he served as the senior security and law enforcement officer for Air Force Special Operations Command, where he provided executive oversight for physical security, law enforcement, anti-terrorism, force protection, and emergency management programs supporting 19,500 Airmen at five main installations and multiple combat operating bases worldwide. He also served as the Chief of Police for three different milit...

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Jeffrey D. Zwirn, CPP, CFPS, CFE, SET, ITFAS-II, CHPA-IV, NFPA 3000, MYSL, MBAT, SSI HALL OF FAME

IDS Research & Development, Incorporated

Tenafly, New Jersey

Security, Fire - Burglar Alarm, Alarm System, Security System, Alarm & Security, Central Station, Telephone Line Security, Fire Alarm, Smoke Detection, Carbon Monoxide, Panic & Holdup, Physical Security, Access Control, Video Surveillance Systems, Manufacturer Specifications, UL & NFPA Standards, Industry Standards

A Master Alarm Technician, Certified Protection Professional (CPP), Board Certified in Security Management, Certified Fire Protection Specialist (CFPS), Certified Fraud Examiner (CFE), Senior Engineering Technician, Level IV Certified (SET) in Fire Protection Engineering Technology/Fire Alarm Systems, Certificate Number 111275 from NICET, Level I and II Certified Engineering Technician, Fire Protection Engineering Technology/Inspection and Testing of Fire Alarm Systems (ITFAS-I, ITFAS-II) from NICET, Certified Homeland Security Protection Associate Level IV (CHPA-IV)by The National Sheriffs’ Association in partnership with The Global Society of Homeland and National Security Professionals. Appointed and Serves on twenty-two (UL) Underwriters Laboratories, Inc. Standard Technical Panels (STP) and is a former Principal Technical Committee Panel Member, Appointed by NFPA 72®, in the Special Expert Category, for The National Fire Alarm Code And The National Fire Alarm and Signaling Code...

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A. Benjamin Mannes, MA, CPP, CESP

Global expert in Security & Duty of Care Liability

Mannes & Associates, LLC

New Jersey

Security, Safety - Duty-of-care, Premises Liaibility, Physical Security, Workplace Violence, Access Control, CCTV, Surveillance, Theft, Investigations, Vetting, Life Safety, Public Safety, Law Enforcement, Harrassment, Emergency Management, Disaster Planning, Emergency Response, Security Guards, Police Response, Background Check

A. Benjamin Mannes, MA, CPP, CESP is an internationally recognized subject matter expert in duty-of-care liability, security, safety, emergency management, and corporate compliance, with over 25 years of operational and consulting experience across federal, state, and corporate environments worldwide. Based in a career in both city & federal law enforcement, Mannes has built global safety & security programs for highly regulated organizations, to include North America's largest medical board, three state education departments, public facilities, transit systems, and a Fortune-300 global corporation. He provides expert testimony and consulting in the following specialties: - Duty-of-Care Liability - Security & Safety - Extensive experience developing, managing, and auditing programs to ensure organizational duty-of-care in corporate, hospitality, education, and healthcare sectors. - Expert witness with opinions entered in multiple jurisdictions regarding organizational responsibilit...

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Marcello R. Kettrles, CPP, PSP, CPD, CCE

Adult Corrections / Negligent Security Litigation

Preventive Security Assessment Services, LLC

New York, New York

Jails & Prisons, Security - Correction Officer, Expert Witness, (CPP®), Crime Prevention Through Environmental Design, Rikers Island East Elmhurst NY, Security Management, Conditions of Confinement, Physical Security, Jail & Prison Practices, Negligent Security, New York City, Certified Correction Executive (CCE), (PSP), (CPD), (CCE)

I am the Founder and Principal of Preventive Security Assessment Services, LLC in New York City. I founded the Preventive Security firm following a distinguished career in law enforcement and security operations spanning more than 35 years. I operate as an Independent Physical Security Consultant providing Litigation Support. Since retiring from the New York City Department of Corrections (NYCDOC) with Peace officer status in 2011, I've continued working in the field of security, while maintaining correction relevance. I bring a rare and specialized perspective to litigation support involving Adult Corrections and Negligent Security. As a retired NYCDOC officer, I have transitioned into a career as an Expert Witness–an uncommon path in this field. "One of the few and perhaps the sole, former Rikers Island officers offering Litigation Support in the United States." I am dual Board-Certified as a Certified Protection Professional (CPP®) and Physical Security Professional (PSP®) ...

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A. Benjamin Mannes, MA, CPP, CESP

Global expert in Security & Duty of Care Liability

Mannes & Associates, LLC

New York

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Joseph Hendry, PSP, CLEE

K-12 Security Subject Matter Expert and Consultant

COSECURE Enterprise Risk Solutions

Stow, Ohio

School Safety, Education & Schools - school security, special needs security planning, active shooter drills, security assessment, duty of care, active shooter, emergency planning, university security, risk assessment, school shooting, lockdown, behavioral threats, workplace violence, school violence, insurance expert witness, physical security, negligent security

Professional Qualifications -K–12 school security and safety systems -Active threat and hostile event preparedness -Security risk assessment and mitigation -Civilian and law‑enforcement response coordination -School emergency planning, policy, and procedures -Duty of care, foreseeability, and reasonableness of preventive measures -Standards‑based practices for age‑appropriate and accessible safety planning Professional Qualifications -Principal Consultant for K–12 Education, COSECURE, a division of Cozen O’Connor, providing school security consulting services across North America and Europe. -Selected in 2024 to provide subject matter expertise to the U.S. Department of Homeland Security Cybersecurity and Infrastructure Security Agency (DHS CISA) School Safety Task Force -Recognized by the Ohio Department of Homeland Security and the Ohio Attorney General’s Office as a subject matter expert in active threat response. -Board Certified Physical Security Professional (PSP) through A...

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Michael J Rein, BA, MA, ACE, CPP, CPD, INCI, CPM, CCCO, EMT

Campus Safety & Security Subject Matter Expert

COSECURE

Philadelphia PA 19103, Pennsylvania

Police Practices & Procedures, Law Enf & Criminal Justice - Campus Safety, Public Safety, Policing, Event Management, Security, Threat Assessment, Physical Security, Emergency Communications, Clery Act, Title IX, Incident Command, Intercollegiate Sports, Collective Bargaining, Labor & Employee Relations, Accreditation, Shared Services, CCTV

Michael J. Rein is the Principal Consultant at COSECURE (formerly a part of The Healy+ Group and Margolis Healy and Associates), an ancillary business of Cozen O’Connor. Well-versed in law enforcement, emergency medical services, and fire service, Mike assists clients in assessing their public safety needs and developing and implementing improvement programs to increase the effectiveness of initiatives and achieve organizational goals. Mike is experienced in leadership and management with a demonstrated record of concern for the public and delivering exceptional public safety services. Before joining COSECURE, Mike was a Rutgers University Department of Public Safety member, retiring in 2022 as the Deputy Chief of University Police. In this role, he served as the executive officer, primarily responsible for all functions of professional standards. Mike has extensive experience in the management of large events gained as the incident commander for NCAA Football and Basketball in t...

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A. Benjamin Mannes, MA, CPP, CESP

Global expert in Security & Duty of Care Liability

Mannes & Associates, LLC

Philadelphia, Pennsylvania

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Elizabeth J Dumbaugh, CPP

Major, US Army Reserve-Premises Liability Expert

THG Consultants

Texas

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Bruce D. Alpe

Premise Liability Expert - Banking, FBI, Sr. CSO

The Alpe Group

Houston , Texas

Premises Liability, Security - Risk management, Threat Assessments, Security Assessments, Executive Protection, Physical Security, Large Venue Security, Special Event Security Design, Special Event Security Management, Premise Liability, Security Layering, Access Control, luxury Residence Security, Evolv Weapons Detection System, Active Shooter

Bruce David Alpe, MSM, CPP Security & Risk Management Expert | Premises Liability & Litigation Support Overview Security executive with 20+ years of accomplishments in security and crisis management leadership. Awarded the FBI Medal of Excellence for risk mitigation strategies, performance across physical security standards, and transforming the organization. Recognized with the FBI Director’s High-Impact Leadership Award. Master of Security Management (University of Houston) and Certified Protection Professional (CPP). Recognized expert in premises liability, risk mitigation, and security program design. Retained as a security expert in five legal cases—all successfully resolved. Professional presenter on Active Shooter response, physical security, and large venue/special event security assessments and management. The Alpe Group | February 2026 - Present Founder Design and implement tailored security solutions protecting what matters most to clients staying ahead of evolving t...