Find the Right Expert for Every Case

Global Leader in Safety, Security, Investigations, and Emergency Management

A. Benjamin Mannes, MA, CPP, CESP is a safety and security expert specializing in public safety, security investigations, and emergency management. With a career spanning federal law enforcement, corporate compliance, and risk management, he brings a strategic and regulatory framework to his litigation work. His work centers on investigating duty-of-care obligations, assessing compliance with safety regulations, and evaluating security protocols in various sectors. Mr. Mannes has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to duty-of-care liability, corporate compliance, and security management in industries such as banking, transportation, and education. His Master of Arts in Organizational Leadership, along with certifications such as Certified Protection Professional (CPP) and Certified Exam Security Professional (CESP), 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 and safety compliance.

President and CEO

Brian G. Pfeifer, Ph.D., P.E. is an engineering expert specializing in accident reconstruction and roadside safety. With a career encompassing design, development, and implementation of safety hardware, he brings a technical and innovative framework to litigation work. His work centers on investigating accident causation, assessing product failures, and evaluating whether safety standards were met. Mr. Pfeifer has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to automobile collisions, roadside safety, and patent litigation. His Ph.D. in Civil Engineering, along with certifications such as the FAA Remote Pilot Certification and Florida Advanced Work Zone Traffic Control, 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 mechanical systems and product failures.

President & Chief Consultant

William S. Marcisz, JD, CPP, CHPA is a security management and consulting expert specializing in negligent security and violent crime litigation. With a career spanning security administration, legal practice, and healthcare security, he brings a multifaceted perspective to his litigation work. His work centers on investigating security breaches, assessing compliance with industry standards, and evaluating whether security protocols were adequately implemented. Mr. Marcisz has been retained in numerous expert witness and consulting engagements across the United States, involving cases in healthcare, hospitality, and corporate security sectors. His Juris Doctorate in Law, along with certifications as a Certified Protection Professional (CPP) and Certified Healthcare Protection Associate (CHPA), 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.

Faculty, Emergency Care Specialists

Daniel Overbeek, MD is an Emergency Medical Toxicology expert specializing in toxicology, addiction medicine, and emergency care. With a career spanning clinical practice, medical education, and toxicology research, he brings a multifaceted perspective to litigation work. His work centers on investigating toxicological impacts, assessing addiction-related medical issues, and evaluating whether emergency care standards were met. Dr. Overbeek has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to toxicology, addiction medicine, and emergency medical care. His Doctor of Medicine from Wayne State University School of Medicine, along with board certifications from the American Board of Emergency Medicine, American Board of Emergency Medicine in Medical Toxicology, and American Board of Preventative Medicine in Addiction 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 medical toxicology and emergency medicine.

Consultant Oral and Maxillofacial Surgeon / Honorary Senior Clinical Lecturer

Ross O. C. Elledge BChD(Hons) MBChB(Hons) MMedEd MFDS MAcadMedEd SFHEA FRCS(OMFS) is an Oral and Maxillofacial Surgery expert specializing in temporomandibular joint disorders and skin cancer management. With a career encompassing both clinical practice and medical education, he brings a multifaceted perspective to his litigation work. His work centers on investigating surgical errors, assessing causation in maxillofacial trauma, and evaluating whether standard of care was met in dental malpractice cases. Mr. Elledge has been retained in numerous expert witness and consulting engagements across the UK, involving cases related to dental negligence, facial trauma, and reconstructive surgery. His Doctor of Medicine (MD) by research from the University of Birmingham, along with his Cardiff University Bond Solon (CUBS) Expert Witness Certificate (Civil), 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 oral and maxillofacial surgery.

Forensic Psychiatrist and Med-Legal Consultant

Sanjay Adhia, M.D., MRO is a forensic psychiatry expert specializing in forensic evaluations and psychiatric injury assessments. With a career encompassing forensic psychiatry, brain injury medicine, and psychiatric injury assessment, he brings a nuanced understanding of complex psychiatric and neurological issues to litigation work. His work centers on investigating psychiatric causation, assessing competency and testamentary capacity, and evaluating whether standard of care deviations have occurred. Dr. Adhia has been retained in numerous expert witness and consulting engagements nationwide, involving cases related to forensic psychiatry, brain injury medicine, and medical malpractice. His Doctor of Medicine from M.S. Ramaiah Medical College, along with certifications in Psychiatry, Forensic Psychiatry, and Brain Injury 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 psychiatric injury and forensic evaluations.

Industrial Hygiene & Safety Consultant, & Expert Witness

Nancy M. McClellan, M.P.H., CIH, CHMM is an industrial hygiene and safety expert specializing in workplace chemical, biological, and physical health and safety hazards in high hazard industries. With a career encompassing international program management, advisory board leadership, and technical authorship, she brings a strategic and globally informed perspective to her litigation work. Her work centers on investigating bioaerosol and pandemic particulate controls, assessing chemical and non-chemical disinfectant exposure risks, and evaluating facility pandemic resilience. Ms. McClellan has been retained in numerous expert witness and consulting engagements across the United States, involving cases in industries such as pharmaceuticals, construction, and healthcare. Her Master of Public Health in Industrial Hygiene, along with certifications from the American Board of Industrial Hygiene and the Institute of Hazardous Materials Management, 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 occupational hygiene and safety program compliance.

Expert Witness Real Estate, Construction and Finance

Jeffery Potter, MRED, CCIM is a real estate and construction expert specializing in complex legal disputes involving real estate development, construction processes, and financial structuring. With a career spanning over four decades in real estate, construction, and finance, he brings a multifaceted perspective to litigation work. His work centers on investigating construction defects, assessing financial structuring in real estate transactions, and evaluating whether industry standards have been met. Mr. Potter has been retained in numerous expert witness and consulting engagements across the Western United States, involving commercial real estate, construction, and financial disputes. His Master of Real Estate Development from the University of Southern California, along with his Certified Commercial Investment Member designation, 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 real estate development and construction processes.

Orthopedic Surgeon

Airell L Nygaard M.D., FAAOS, FAAHKS is an orthopedic surgery expert specializing in forensic medicine and personal injury litigation. With a career spanning orthopedic surgery, sports medicine, and joint replacement, he brings a comprehensive framework to his litigation work. His work centers on investigating personal injuries, assessing orthopedic surgical outcomes, and evaluating whether standard of care deviations occurred. Dr. Nygaard has been retained in numerous expert witness and consulting engagements across the United States, involving cases such as slip and falls, transportation-related accidents, and sports injuries. His Doctor of Medicine from Baylor College of Medicine, along with certifications as a Diplomat of the American Board of Orthopedic Surgery and Fellow of the American Academy of Orthopedic Surgeons, 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 orthopedic injuries and treatments.

Physician-Scientist

Frederick Herman Hausheer, M.D., F.A.C.P. is an oncology and pharmaceutical research expert specializing in the development and regulation of novel cancer therapeutics. With a career spanning executive leadership in global pharmaceutical research and development, he brings a strategic perspective to litigation involving drug development and compliance. His work centers on investigating patent validity, assessing regulatory compliance, and evaluating whether industry standards in oncology drug development have been met. Dr. Hausheer has been retained in numerous expert witness and consulting engagements across the United States, involving pharmaceutical research, oncology drug development, and regulatory compliance. His M.D. from the University of Missouri-Columbia, along with certifications such as Designated Clinical Investigator by the National Cancer Institute, 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 pharmaceutical regulation and oncology therapeutics.

Chiropractic Physician, Expert Witness, Independent Medical Examiner

Dr. Steven B. Ross, DC, FASBE, DAAPM is a chiropractic and biomechanics expert specializing in spinal biomechanics, motor vehicle trauma, and soft-tissue injury analysis. With a career encompassing clinical, diagnostic, and forensic domains, he brings a comprehensive framework to his litigation work, integrating advanced training in biophysical diagnostics and pathobiomechanical syndromes. His work centers on investigating motor vehicle trauma, assessing cervical acceleration-deceleration injuries, and evaluating mechanical plausibility in injury cases. Dr. Ross has been retained in numerous expert witness and consulting engagements across the United States, involving motor vehicle accidents, spinal injuries, and trip-and-fall events. His Doctor of Chiropractic from Northwestern Health Sciences University, along with certifications such as Auto Crash Reconstruction and Whiplash and Mild Traumatic Brain Injuries, 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 spinal biomechanics and related injuries.

Forensic Meteorologist | Environmental Compliance Expert | AI Meteorological Specialist

John Bryant, AMS, NWA, EPA-Certified is a forensic meteorologist expert specializing in forensic weather analysis and environmental compliance. With a career spanning forensic weather analysis, environmental compliance, and AI-driven meteorological modeling, he brings a multidisciplinary perspective to litigation work. His work centers on investigating weather-related causation in personal injury claims, assessing compliance with environmental regulations, and evaluating the impact of weather events on legal outcomes. Mr. Bryant has been retained in numerous expert witness and consulting engagements across the United States, involving personal injury claims, insurance litigation, and wrongful death cases. His B.S. in Geosciences with an emphasis in Meteorology and Atmospheric Science, along with certifications from the American Meteorological Society (AMS), National Weather Association (NWA), and the Environmental Protection Agency (EPA), 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 severe weather events and environmental compliance.

Psychiatrist and Psychoanalyst

Mark I. Levy, MD, FAPA is a forensic psychiatry expert specializing in psychological trauma and mass tort/multi-plaintiff litigation. With a career spanning general psychiatry, psychoanalysis, and forensic evaluations, he brings a nuanced understanding of psychological impacts in legal contexts. His work centers on investigating psychological injuries, assessing the effects of trauma, and evaluating whether psychiatric standards of care were met. Dr. Levy has been retained in numerous expert witness and consulting engagements across the United States, involving cases such as psychological trauma from accidents, workplace stress, and PTSD. His M.D. from the College of Physicians and Surgeons, Columbia University, along with his Diplomate certifications from the American Board of Psychiatry and Neurology, 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 psychological trauma and psychiatric care.

Results-Centric, Solutions-Focused Police Practices and Security Expert

Adam Bercovici is a Police Practices and Security Expert specializing in police use of force, tactical operations, and security practices. With a career spanning elite police leadership, private investigation, and policy development, he brings a multifaceted perspective to litigation work. His work centers on investigating officer-involved shootings, assessing security protocols, and evaluating whether police procedures align with best practices. Mr. Bercovici has been retained in numerous expert witness and consulting engagements across the United States, involving cases such as criminal conspiracy, wrongful death, and premises liability. His Bachelor of Arts in English Literature from Claremont McKenna College, along with California POST Certificates and a California Licensed Investigator credential, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of police responsibility in disputes involving use of force and internal affairs best practices.

Consultant, Expert Witness, COO

Harry G. Direen Jr, Ph.D, PE is an electrical and software engineering expert specializing in intellectual property litigation and patent infringement analysis. With a career spanning control systems, high performance computing, and UAV autonomous control, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating patent infringement, assessing product reverse engineering, and evaluating whether control systems meet industry standards. Dr. Direen has been retained in numerous expert witness and consulting engagements across the United States, involving intellectual property cases, UAV systems, and high-performance computing technologies. His Ph.D. in Electronics Engineering / Control Systems, along with his Professional Engineer license in Colorado, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of patent validity and infringement in disputes involving complex electronic and software systems.

Board-Certified Clinical Neuropsychologist

Stephen E. Francis, Ph.D. ABN, FACPN is a Clinical Neuropsychology expert specializing in personal injury and workers' compensation cases. With a career encompassing chronic pain, anxiety, stress-related disorders, PTSD, and traumatic brain injuries, he brings a nuanced understanding of neuropsychological impacts to litigation work. His work centers on investigating symptom validity, assessing neuropsychological functioning, and evaluating the presence of malingering in complex cases. Mr. Francis has been retained in extensive expert witness and consulting engagements across California and Nevada, involving personal injury, workers' compensation, and forensic neuropsychology cases. His Doctor of Philosophy in Clinical Psychology, along with his Board-Certified Clinical Neuropsychologist designation by the American Board of Professional Neuropsychology (ABN), 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 traumatic brain injuries and psychological disorders.

Active Lender

Jay Hibert, Licensed California Real Estate Broker is a banking and real estate lending expert specializing in commercial and real estate loans, brokerage, and valuation disputes. With a career spanning corporate banking, real estate brokerage, and financial consulting, he brings a multifaceted perspective to litigation work. His work centers on investigating lending practices, assessing real estate valuations, and evaluating whether fiduciary responsibilities were upheld. Mr. Hibert has been retained in numerous expert witness and consulting engagements across 24 states, involving commercial and real estate loans, house flipping, construction finance, and brokerage standards. His B.A. in Philosophy, Economics, and Accounting from Pomona College, along with his Licensed California Real Estate Broker designation, 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 and responsibility in disputes involving real estate and financial transactions.

Principal

Benjamin Darby Casey, PE, CPP, PSP, DBIA, MBA is a fire protection and security engineering expert specializing in fire protection systems design and security integration. With a career spanning fire protection engineering, security systems, and building code analysis, he brings a comprehensive understanding of risk management and safety compliance to litigation work. His work centers on investigating fire origins and causes, assessing security vulnerabilities, and evaluating compliance with fire safety codes. Mr. Casey has been retained in numerous expert witness and consulting engagements across the United States, involving complex risk-based engineered systems and unique solutions for industries such as data centers, hospitals, and cultural institutions. His BS in Fire Protection Engineering from the University of Maryland, along with certifications such as Physical Security Professional (PSP) and Certified Protection Professional (CPP), 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 security systems.