Rapid Rectangular Flashing Beacon (RRFB)
Jocelyn Mamchur
Supervising Civil Engineer – Transportation / Signals / ITS
Mountlake Terrace, WA18 years+ yrs★ 8.4
Pedestrian SafetyCrosswalk ExpertTraffic Signals+19
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Showing 577–594 of 1,756 experts
Supervising Civil Engineer – Transportation / Signals / ITS
Jocelyn Mamchur, PE is a transportation engineering expert specializing in traffic signal systems and Intelligent Transportation Systems (ITS) litigation. With extensive experience in municipal engineering and public agency standards, she brings a nuanced understanding of design compliance and safety analysis to her litigation work. Her work centers on investigating traffic signal failures, assessing compliance with engineering standards, and evaluating whether deviations from the Manual on Uniform Traffic Control Devices (MUTCD) have occurred. Ms. Mamchur has been retained in numerous expert witness and consulting engagements across the Pacific Northwest, involving municipal liability and pedestrian safety cases. Her Bachelor of Science in Engineering from the University of Manitoba, along with her Professional Engineer (PE) license in Washington State, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of standard of care in disputes involving traffic control devices and roadway lighting.
Mechanical Engineering, Accident Reconstruction, Biomechanics and Safety Expert
Kristopher J Seluga, Licensed Professional Engineer is a mechanical engineering expert specializing in accident reconstruction, biomechanics, and safety. With a career encompassing dynamic testing, software development for accident simulations, and forensic engineering, he brings a multifaceted analytical perspective to litigation work. His work centers on investigating motor vehicle and machinery accidents, assessing product liability claims, and evaluating safety compliance in construction and industrial settings. Mr. Seluga has been retained in numerous expert witness and consulting engagements across Connecticut and New York, involving motor vehicle accidents, product liability, and premises liability cases. His M.S. in Mechanical Engineering from M.I.T., along with OSHA 10-hour Construction Safety and Health 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 causation in disputes involving accident dynamics and safety standards.
Senior Consultant
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.
Real estate expert
John L. Pagliassotti is a real estate expert specializing in commercial real estate brokerage, property management, and dispute resolution. With a career encompassing diverse roles in asset management, brokerage, and mediation, he brings a multifaceted perspective to litigation work. His work centers on investigating fiduciary duties and duty of care, assessing compliance with AIR contracts, and evaluating lease and purchase/sale contract disputes. Mr. Pagliassotti has been retained in numerous expert witness and consulting engagements across the United States, involving commercial real estate, property management, and partnership disputes. His Bachelor of Arts Degree from the University of California at Los Angeles, along with certifications such as Property Management Certification from Cornell University and Real Estate Finance Certification from Harvard University, 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 landlords, tenants, buyers, sellers, and brokers.
Mechanical and Metallurgical Engineering Consultant
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.
President and CEO, Raptor Pharm & Tox, Ltd
Lyle D. Burgoon, Ph.D., ATS is a toxicology and risk assessment expert specializing in the establishment of causal relationships between chemical exposures and human health effects. With a career spanning pharmacology, biostatistics, exposure modeling, and causal analysis, he brings a multidisciplinary approach to litigation work. His work centers on investigating toxicological impacts, assessing exposure risks, and evaluating whether causal relationships exist between environmental stressors and health outcomes. Dr. Burgoon has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to drug testing, environmental exposure, and product safety. His Ph.D. in Pharmacology & Toxicology with Environmental Toxicology, along with his Board Certification as a Fellow of the Academy of Toxicological Sciences, 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 toxicological and environmental assessments.
Independent Security Consultant
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.
Property Management Standard of Care Expert
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.
Testifying Software Development Expert
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.
Commercial Property Management and Brokerage Expert
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.
Founder & Chief Executive Officer
Charles McGilvary Johnson is a security management and premises liability expert specializing in negligent security and premises liability litigation. With a career encompassing security assessments, physical security, and access control systems, he brings a comprehensive understanding of security protocols and risk mitigation strategies to his litigation work. His work centers on investigating security breaches, assessing compliance with industry standards, and evaluating whether security measures were adequate. Mr. Johnson has been retained in numerous expert witness and consulting engagements across Florida and Georgia, involving cases related to apartment and condo security, video surveillance, and access control systems. His Physical Security Professional certification from ASIS International and Florida CPTED Practitioner certification from the Florida Department of Law Enforcement 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.
Founding Partner
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.
Certified Physical Security and Threat Assessment Expert
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.
Consulting Engineer in Civil Engineering
Keith A. Bergman, PE is a civil engineering expert specializing in highway and street design, traffic engineering, and utilities construction. With extensive experience in construction management, project-related claims, and job site safety, he brings a comprehensive understanding of codes and standards to his litigation work. His work centers on investigating premise liability, assessing pedestrian safety, and evaluating whether ADA compliance has been met. Mr. Bergman has been retained in numerous expert witness and consulting engagements across the United States, involving premises liability, traffic engineering, and construction management cases. His Bachelor of Science Degree in Civil Engineering from San Diego State University, along with his Professional Engineer certifications in multiple states, 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 walkway surface evaluations, storm drainage, and pedestrian safety.
Certified Public Accountant
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.
Master Mariner
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 Expert/USCG Master of Towing Vessels
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.
Expert Witness
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.
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