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Expert Witness Directory

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Browse our verified directory of expert witnesses spanning medicine, engineering, finance, and dozens of specialized fields.

Showing 577594 of 1,760 experts

Slip and Fall

Jeffrey S. Lapin, CPM®, ARM®, DREI®

Property Management Standard of Care Expert

Spring City, TN40 years+ yrs8.4

Jeffrey S. Lapin, CPM®, ARM®, DREI® is a property management standard of care expert specializing in landlord premises liability and fiduciary duties for commercial and residential properties. With a career spanning real estate management, maintenance, and financial oversight, he brings a comprehensive framework to litigation work involving property safety and fiduciary responsibilities. His work centers on investigating landlord and property manager duties, assessing compliance with inspection and maintenance protocols, and evaluating whether industry standards were met. Mr. Lapin has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to slip and fall, fire safety, and security breaches in commercial and residential properties. His Master of Business Administration from Pepperdine University, along with his Certified Property Manager (CPM®), Accredited Residential Manager (ARM®), and Distinguished Real Estate Instructor (DREI®) certifications, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of standard of care in disputes involving property management and risk management.

FireIce FallsSecurity Breach+16
Engineering

Mark S. Wassom, P.E.

Senior Consultant

Lenexa, KS30 years+ yrs8.4

Mark S. Wassom, P.E. is a fire protection engineering expert specializing in code consultation and fire investigation. With a career encompassing fire protection engineering, code consultation, and fire investigation, he brings a comprehensive understanding of fire safety systems and regulatory compliance to his litigation work. His work centers on investigating fire incidents, assessing code compliance, and evaluating whether fire protection systems meet industry standards. Mr. Wassom has been retained in numerous expert witness and consulting engagements across the United States, involving commercial, industrial, educational, and healthcare facilities. His B.S. in Architectural Engineering, along with certifications such as Certified Fire Investigator and Certified Fire Marshal, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving fire protection and life safety systems.

FireFire protection engineeringCode consultation+1
Litigation technical support

Jamie L. Petty-Galis, M. S., P.E.

Mechanical and Metallurgical Engineering Consultant

Southlake, Texas8.4

Jamie L. Petty-Galis, M. S., P.E. is a forensic metallurgical and mechanical engineering expert specializing in material failure analysis and structural integrity assessment. With a career encompassing diverse material applications in industries such as aviation, biomedical, and oil and gas, she brings a multidisciplinary approach to her litigation work. Her work centers on investigating material failures, assessing structural integrity, and evaluating the root causes of system failures. Ms. Petty-Galis has been retained in numerous expert witness and consulting engagements across the United States, involving cases in aviation, oil and gas, and transportation industries. Her M.S. in Materials Science from The University of Texas at Arlington, along with her Texas Professional Engineer license, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving complex material systems.

Metallic material failure analysisComposite material failure analysisPlastic material failure analysis+9
Real Estate

Rick Rivera

Commercial Property Management and Brokerage Expert

Los Angeles, CA34 years+ yrs8.4

Rick Rivera is a commercial property management and brokerage expert specializing in landlord-tenant disputes and mismanagement claims. With a career spanning property management operations, common area maintenance, and lease transaction oversight, he brings a strategic perspective to litigation involving real estate investments and compliance issues. His work centers on investigating premises liability, assessing standard of care duties, and evaluating whether customs and practices have been adhered to. Mr. Rivera has been retained in numerous expert witness and consulting engagements across California, involving premises liability, landlord vs. tenant disputes, and partnership conflicts. His Bachelor of Arts in Humanities (Ethics) from Menlo College, along with his California Real Estate Broker license, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving commercial real estate and brokerage practices.

Property ManagementProperty Management OperationsCommon Area Maintenance+14
Physical Security Surveys

Vince Vittatoe

Independent Security Consultant

McKinney, TX8.4

Vince Vittatoe, CPP, CSC, CPTED is a security consulting expert specializing in premises liability and negligent security litigation. With a career spanning law enforcement, hospitality security management, and independent consulting, he brings a comprehensive understanding of security protocols and risk mitigation strategies to his litigation work. His work centers on investigating security breaches, assessing risk management practices, and evaluating whether security standards were upheld. Mr. Vittatoe has been retained in numerous expert witness and consulting engagements across North America, involving hospitality, corporate security, and public safety cases. His Bachelor of Business Administration in Accounting, along with certifications such as Certified Protection Professional and Certified Security Consultant, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving security management and premises liability.

Threat and Crime AnalysisSecurity ManagementWorkplace Violence Planning+5
Software Engineering

David S. Howell

Testifying Software Development Expert

Long Island City, NY35+ years+ yrs8.4

David S. Howell, Testifying Software Development Expert is a software development and engineering management expert specializing in intellectual property and contract disputes. With a career spanning tech entrepreneurship, engineering management, and software innovation, he brings a strategic and technical framework to litigation work. His work centers on investigating software code integrity, assessing patent infringement claims, and evaluating whether engineering practices meet industry standards. Mr. Howell has been retained in numerous expert witness and consulting engagements across the U.S. and U.K., involving high-profile cases with companies like Apple, Amazon, and TikTok. His Doctor of Engineering in Artificial Intelligence and Machine Learning, along with a Master of Legal Studies in Intellectual Property and Technology Law, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving software development and intellectual property.

Intellectual PropertySoftware DevelopmentEngineering Management+3
Premises Liability

Charles T. Ahmad

Founding Partner

Mableton, GA8.4

Charles T. Ahmad, CPP is a security risk management expert specializing in premises liability for negligent security. With a career spanning security management, behavioral threat assessment, and tactical operations, he brings a strategic perspective to litigation work. His work centers on investigating security negligence, assessing threat management protocols, and evaluating whether security measures meet industry standards. Mr. Ahmad has been retained in numerous expert witness and consulting engagements across the United States, involving apartment complex violent crime, gas station and convenience store violent crime, and security negligence cases. His Bachelor of Science in Criminal Justice Sciences, along with certifications such as Certified Protection Professional/Board Certified in Security Management and Force Science Certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving security risk management and use of force.

SecuritySecurity Risk ManagementThreat Assessment+4
Security and Premises Liability

Joshua Shelton

Certified Physical Security and Threat Assessment Expert

Atlanta, Georgia20+ years+ yrs8.4

Joshua Shelton, Certified Protection Professional, Certified Threat Manager is a certified physical security and threat assessment expert specializing in security and premises liability litigation. With a career encompassing law enforcement and corporate security, he brings a multifaceted perspective to his litigation work. His work centers on conducting vulnerability assessments, facilitating behavioral threat assessment training, and evaluating the adequacy of security measures in various environments. Mr. Shelton has been retained in numerous expert witness and consulting engagements across Georgia and Federal courts, involving cases of inadequate security, workplace violence, and premises liability in industries such as gas stations, apartments, and parking garages. His Master of Science in Criminal Justice from the University of the Cumberlands, along with certifications as a Certified Protection Professional and Certified Threat Manager, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving security management and threat assessment.

Security ManagementThreat Assessment
Podiatry

Gennady Kolodenker

DPM, ABPM

Irvine, CA8.4

Gennady Kolodenker, DPM, ABPM is a podiatry and sports medicine expert specializing in adult and pediatric sports medicine, surgery, and complex foot and ankle trauma management. With a career encompassing trauma, limb preservation, diabetic wounds, and reconstructive surgery, he brings a multifaceted perspective to litigation work. His work centers on investigating trauma-related injuries, assessing surgical outcomes, and evaluating whether standard of care was met in podiatric cases. Dr. Kolodenker has been retained in numerous expert witness and consulting engagements across California, involving sports medicine, trauma, and podiatric surgery cases. His Doctorate of Podiatric Medicine from Rosalind Franklin University of Medicine and Science, along with his Board Certification from the American Board of Podiatric Medicine, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving podiatric injuries and surgical interventions.

Wound CareSports MedicineSurgery+2
Toxicology

Lucy H. Fraiser

Principal Scientist

Fayetteville, AR25 years+ yrs8.4

Lucy H. Fraiser, Ph.D., DABT is a toxicology expert specializing in air quality health evaluations and risk assessments. With a career spanning public and private sector roles, she brings a nuanced understanding of regulatory frameworks and scientific foundations to her litigation work. Her work centers on investigating exposure pathways, assessing health impacts of air pollutants, and evaluating whether emissions contribute to regulatory violations. Dr. Fraiser has been retained in numerous expert witness and consulting engagements across the United States, involving toxic tort litigation, environmental compliance, and industrial emissions cases. Her Ph.D. in Toxicology from the University of Texas at Austin, along with her Diplomate of the American Board of Toxicology certification, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving air quality and toxicological impacts.

EnvironmentalToxicological EvaluationsRisk Assessments+4
Business Damages

Ernest Anton Janik, Jr.

Certified Public Accountant

Dallas, TX35 years+ yrs8.4

EJ Janik, CPA, CFF, CFE, CFLC is a forensic accounting expert specializing in business dispute consulting and fraud analyses. With a career spanning forensic accounting, fraud investigations, and construction claims, he brings a multifaceted analytical framework to litigation work. His work centers on investigating financial discrepancies, assessing business damages, and evaluating whether industry standards were met in complex financial disputes. Mr. Janik has been retained in numerous expert witness and consulting engagements across the United States, involving cases in industries such as construction, energy, and real estate. His Master of Science in Accounting from Louisiana State University, along with certifications as a Certified Public Accountant, Certified in Financial Forensics, Certified Fraud Examiner, and Certified Forensic Litigation Consultant, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving forensic accounting and fraud investigations.

AccountingForensic AccountingFraud Analyses/Investigations+2
Maritime

Olie Franklin Morton, Jr.

Maritime Expert/USCG Master of Towing Vessels

New Orleans, LA30+ years+ yrs8.4

Olie Franklin Morton, Jr., Master of Towing Vessels (unlimited), RADAR Observer (unlimited), Designated Examiner, FCC-GMDSS Operator, Subchapter M Lead Surveyor/Auditor, ISO 9001-2015 Lead Auditor is a maritime expert specializing in maritime navigation, vessel safety, and compliance. With a career encompassing diverse roles in vessel operations and shoreside management, he brings a comprehensive operational framework to litigation involving maritime casualties and compliance issues. His work centers on investigating maritime collisions, assessing vessel compliance with Subchapter M, and evaluating whether industry standards were met in towing operations. Mr. Morton has been retained in numerous expert witness and consulting engagements across the Gulf Coast, involving maritime casualties, vessel operations, and compliance disputes. His Master of Towing Vessels (unlimited) and RADAR Observer (unlimited) certifications reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving maritime navigation and safety.

Transportation
Maritime and Fire

Capt. Sean Paul Tortora

Master Mariner

East Islip, New York35 years+ yrs8.4

Capt. Sean Paul Tortora, MS, USMS is a maritime safety and logistics expert specializing in maritime accident investigations and consultations. With a career spanning maritime operations, navigation law, and marine firefighting, he brings a comprehensive operational framework to litigation work. His work centers on investigating maritime casualties, assessing compliance with maritime safety regulations, and evaluating whether industry standards were met in maritime operations. Mr. Tortora has been retained in numerous expert witness and consulting engagements across the United States, involving maritime casualties, logistics, and navigation disputes. His Master of Science in International Transportation, along with certifications such as U.S. Coast Guard Merchant Mariner Credential and Dynamic Positioning Operator Certified, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving maritime safety and logistics.

Maritime SafetyLogisticsNavigation
Product failure analysis involving water loss, fire & explosions, accidents, & forensic investigations.

Joseph Quinn, M.S., P.E.

Expert Witness

Los Angeles, CA20+ years+ yrs8.4

Joseph Quinn, M.S., P.E. is a materials engineering and failure analysis expert specializing in product failure analysis involving water loss, fire and explosions, accidents, and forensic investigations. With a career spanning material failures due to abuse/misuse, application, design, environment, fabrication, installation, maintenance, manufacturing, and processing, he brings a comprehensive framework to litigation work. His work centers on investigating product failures, assessing material degradation, and evaluating whether engineering design standards were met. Mr. Quinn has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to construction defects, product liability, and mechanical failures. His Master of Science in Materials Engineering, along with his Licensed Professional Engineer designation in Metallurgical Engineering, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving product design and material integrity.

Material failures due to abuse/misuse, application, design, environment, fabrication, installation, maintenance, manufacturing, & processing.Fracture analysis of Metals, Plastics & GlassCorrosion & Degradation+23
Maritime and Emergency Medicine

Victor Gomez

Maritime Medical Expert

Bogota, Florida15+ years+ yrs8.4

Victor Gomez, MD, MSc, MA, MBA(C) is a maritime medical expert specializing in shipboard standards of care, clinical decision-making, and emergency response. With a career spanning emergency, occupational, and cruise-ship medicine, he brings a comprehensive understanding of maritime medical systems to his litigation work. His work centers on investigating shipboard medical practices, assessing compliance with maritime standards, and evaluating whether clinical protocols were appropriately followed. Mr. Gomez has been retained in numerous expert witness and consulting engagements primarily in Florida, involving cruise-ship medical care cases. His Master of Science in Emergency Medicine and Critical Care, along with certifications such as Basic Offshore Safety Induction and Emergency Training (BOSIET) and Advanced Cardiac Life Support, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of standard of care in disputes involving maritime medical practices.

Shipboard & Remote MedicineOccupational & Workplace MedicineAcute Care & Emergency Medicine+7
Gear and bearing design and analysis

Hanspeter Dinner

Managing Director

Bubikon8.4

Hanspeter Dinner, Dipl. Masch. Ing. ETH, Dipl. Vertriebsingenieur VDI is a gear and bearing design and analysis expert specializing in mechanical engineering litigation. With a career encompassing roles in software support, project engineering, and global sales, he brings a multifaceted perspective to his litigation work. His work centers on investigating gear and bearing failures, assessing engineering analysis processes, and evaluating whether design processes meet certification standards. Mr. Dinner has been retained in numerous expert witness and consulting engagements across Europe and Asia, involving wind turbines, industrial gearboxes, and fine pitch gear industries. His Dipl. Masch. Ing. ETH in Mechanical Engineering, along with his Dipl. Vertriebsingenieur VDI, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving gear and transmission optimization.

FEM analysisTorsional dynamicsSlewing bearing calculations+9
Law Enf & Criminal Justice

John T. Vance

Law Enforcement Officer

Sunset, Texas28 years+ yrs8.4

John T. Vance is a law enforcement and criminal justice expert specializing in police practices and procedures, criminal investigations, and crisis negotiation. With a career spanning roles in the Texas Highway Patrol, Texas Rangers, and as a Special Ranger, he brings a multifaceted perspective to litigation work involving law enforcement operations and standards. His work centers on investigating officer-involved shootings, assessing use of force incidents, and evaluating whether correctional facilities adhered to legal and procedural standards. Mr. Vance has been retained in numerous expert witness and consulting engagements across Texas, involving cases of custodial deaths, use of force, and police practices. His Bachelor of Science in Criminal Justice, along with certifications such as Peace Officer Certification and Firearms Instructor Certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving law enforcement conduct and correctional facility operations.

Police Practices & ProceduresCriminal InvestigationsCrisis Negotiation+2
Security

Michelle L. Chace

Security/Premise Liability Expert

Daytona Beach, Florida20+ years+ yrs8.4

Michelle L. Chace, MSSM is a Security and Premises Liability expert specializing in negligent security analysis and premises liability litigation. With a career encompassing physical security, threat assessment, and risk management, she brings a comprehensive framework for evaluating security failures and applying industry standards to litigation contexts. Her work centers on investigating alleged security deficiencies, assessing compliance with security protocols, and evaluating whether industry standards were met. Ms. Chace has been retained in numerous expert witness and consulting engagements across the United States, involving premises liability and negligent security cases in residential, commercial, and critical infrastructure sectors. Her Master of Science in Security Management, along with certifications as a Florida Crime Prevention Through Environmental Design (CPTED) Practitioner and advanced training from Sandia National Laboratories, FEMA, and the U.S. Department of Homeland Security, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving security management and premises liability.

Premises LiabilitySecurity and Premises LiabilitySecurity Negligence+14
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