Find the Right Expert for Every Case

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.

Incident Investigation – Risk Assessment – Expert Opinion

William H. D. Ostara is a maritime engineering and risk assessment expert specializing in incident investigation and root-cause failure analysis of shipboard equipment. With a diverse background in marine propulsion, electrical systems, and refrigeration systems, he brings a comprehensive understanding of shipboard culture and organizational psychology to his litigation work. His work centers on investigating engineering failures, assessing vessel operations, and evaluating onboard management best practices. Mr. Ostara has been retained in numerous expert witness and consulting engagements across the United States and the United Kingdom, involving marine engineering casualties, personal negligence, and vessel systems. His Bachelor of Science in Liberal Arts from Excelsior University, along with certifications such as the Certificate in Incident Investigation from Lloyd’s Maritime Academy, 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 marine propulsion and electrical systems.

Psy.D., NCSP, ABPP

Ray W. Christner, Psy.D., NCSP, ABPP is a psychological and neuropsychological assessment expert specializing in forensic assessments and expert witness services in educational, civil, and criminal matters. With a career spanning mental health, education, and professional ethics, he brings a nuanced understanding of psychological evaluations and their implications in legal contexts. His work centers on conducting comprehensive psychological evaluations, assessing competency and risk, and evaluating adherence to professional standards. Mr. Christner has been retained in numerous expert witness and consulting engagements across 43 states, involving cases related to special education, ADA compliance, and professional conduct. His Psy.D. in Clinical Psychology, along with certifications such as the Specialized Board Certification in Behavioral and Cognitive Psychology, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of competency and professional responsibility in disputes involving psychological assessments and educational standards.

Registered Psychologist, Psychologist Practitioner, Clinical Psychologist, Counselling Psychologist, Occupational Psychologist, Forensic Psychologist, Neuro-Psychologist, Chartered Psychologist

Ian G. Anderson, PhD is a forensic psychology expert specializing in expert testimony and psychological evaluation in legal contexts. With a career encompassing diverse psychological disciplines, he brings a multifaceted perspective to litigation work, particularly in the areas of risk assessment and psychological trauma. His work centers on investigating psychological competence, assessing risk of violence, and evaluating eyewitness testimony. Mr. Anderson has been retained in numerous expert witness and consulting engagements across the UK, USA, and Bermuda, involving criminal and civil litigation, including personal injury and family matters. His Ph.D. in Models of Diagnosis and their relation to common-sense reasoning, along with certifications as a Chartered Psychologist and Registered Psychologist, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of psychological competence and responsibility in disputes involving forensic psychology.

PsyD, LMFT, LEP, ATP

Adam R. Bruno, PsyD, LMFT, LEP, ATP is a psychology and education expert specializing in the assessment, diagnosis, and treatment of psychological disorders and special education needs. With a career spanning mental health and educational psychology, he brings a nuanced understanding of both therapeutic and educational frameworks to his litigation work. His work centers on investigating psychological conditions, assessing educational accommodations, and evaluating whether legal standards in special education have been met. Mr. Bruno has been retained in numerous expert witness and consulting engagements across multiple states, involving cases related to psychological disorders, special education assessments, and custody dynamics. His Doctor of Psychology in Clinical Specialization, along with certifications as a Licensed Marriage and Family Therapist and Certified Assistive Technology Professional, 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 and educational matters.

President, Project ACHIEVE Educational Solutions

Howard Marc Knoff, Ph.D. is a school psychology expert specializing in educational solutions and school improvement. With a career spanning strategic planning, school discipline, and multi-tiered systems of support, he brings a comprehensive framework to litigation work involving educational malpractice and special education disputes. His work centers on investigating IDEA compliance, assessing psychological misdiagnoses, and evaluating whether school safety protocols meet legal standards. Dr. Knoff has been retained in numerous expert witness and consulting engagements nationwide, involving cases such as IDEA and special education procedures, psychological misdiagnoses, and racial discrimination in schools. His Ph.D. in School Psychology from Syracuse University, along with his Nationally Certified School Psychologist 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 educational malpractice and school safety.

Licensed Clinical Psychologist

Ray S. Kim, Ph.D., LSOE, LSOTP, DAPA, DABPS, FACFEI, FACAPP, CODP II is a forensic psychology expert specializing in psychological evaluations and sex offender assessments. With extensive experience in forensic evaluations, psychological testing, and counseling, he brings a nuanced understanding of the intersection between psychology and the legal system to his litigation work. His work centers on investigating competency to stand trial, assessing violence risk, and evaluating whether diminished capacity is present. Dr. Kim has been retained in numerous expert witness and consulting engagements across Illinois, involving criminal cases, civil matters, and federal evaluations. His Ph.D. in Clinical Psychology from Temple University, along with certifications such as Licensed Clinical Psychologist and Licensed Sex Offender Evaluator, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of competency and responsibility in disputes involving forensic psychological issues.

Licensed Psychologist

Alexandra Clarfield, PhD, QME is a forensic psychology expert specializing in psychological evaluations and expert witness testimony in cases involving personal injury, employment issues, and psychological malpractice. With a career spanning cognitive-behavioral therapy, trauma, and disability impairment, she brings a nuanced understanding of psychological assessments to her litigation work. Her work centers on investigating psychological malpractice, assessing disability impairment, and evaluating whether workplace harassment has occurred. Ms. Clarfield has been retained in numerous expert witness and consulting engagements across California, involving cases related to workers' compensation, immigration evaluations, and military mental health. Her Ph.D. in Clinical Psychology from Temple University, along with her Psychologist License in California, 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 psychological evaluations and trauma assessments.

Consultant Clinical Neuropsychologist

Dr. Tracey Ryan-Morgan, C.Psychol. FBPsS. C.Sci is a Clinical Neuropsychology expert specializing in brain injury rehabilitation and mental capacity assessments. With a career encompassing leadership roles in clinical neuropsychology and brain injury rehabilitation, she brings a comprehensive understanding of neuropsychological principles to her litigation work. Her work centers on investigating brain injury impacts, assessing mental capacity, and evaluating testamentary capacity in complex cases. Dr. Ryan-Morgan has been retained in numerous expert witness and consulting engagements across the UK, involving brain injury, neurorehabilitation, and mental capacity cases. Her PhD in Neuropsychology, along with certifications such as Bond Solon Expert Witness, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of mental capacity and responsibility in disputes involving neuropsychological assessments.

Consultant Clinical Psychologist & Expert Witness

Dr Andy Siddaway BSc(Hons), Clin.Psych, PhD, CPsychol, AFBPsS is a Consultant Clinical Psychologist & Expert Witness specializing in psychological trauma, medical psychology, and clinical risk. With a career integrating NHS clinical practice and expert witness work, he brings a comprehensive understanding of psychological assessments and forensic evaluations to litigation. His work centers on investigating psychological trauma, assessing clinical risk, and evaluating medico-legal evidence. Dr. Siddaway has been retained in numerous expert witness and consulting engagements across the UK, involving personal injury, clinical negligence, and family law cases. His PhD in Clinical Psychology, along with his Chartered Psychologist status and HCPC registration, 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 psychological trauma and clinical risk.

Consultant Clinical Neuropsychologist

Dr. David A. Nathaniel-James, BA (Hons), MSc, PhD, DClinPsy, CPsychol, CSci, AFBPsS is a Consultant Clinical Neuropsychologist expert specializing in neuropsychological assessment and treatment related to traumatic brain injury and clinical negligence claims. With a career encompassing roles in neuropsychology, mental health, and academic contributions, he brings a comprehensive framework to litigation work involving complex cognitive and behavioral evaluations. His work centers on investigating cognitive impairments, assessing neurorehabilitation needs, and evaluating whether neurocognitive deficits align with claimed injuries. Dr. Nathaniel-James has been retained in numerous expert witness and consulting engagements across the UK, involving high-profile brain injury and clinical negligence cases. His PhD in Neuropsychology, along with certifications such as Chartered Scientist and Chartered Psychologist, 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 injury and neurological disorders.

Managing Director

CHARLES HARRIS HELLER, PH.D. is a forensic psychology expert specializing in criminal behavior analysis and child custody evaluations. With a career encompassing forensic psychology, child custody evaluations, and domestic violence assessment, he brings a nuanced understanding of psychological dynamics to his litigation work. His work centers on investigating criminal behavior, assessing competency to stand trial, and evaluating the psychological impact of domestic violence. Dr. Heller has been retained in numerous expert witness and consulting engagements across the United States, involving criminal cases, child custody disputes, and domestic violence assessments. His Ph.D. in Psychology from the University of Wisconsin-Madison, along with certifications such as the Certificate of Professional Qualification in Psychology and the Telepsychology Competencies 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 responsibility in disputes involving forensic psychological evaluations.

Consultant Clinical Neuropsychologist; Consultant Clinical Psychologist

Dr. Sundeep Sembi, B.Sc. (Hons.), Clin.Psy.D., C. Psychol., AFBPsS. is a Consultant Clinical Neuropsychologist specializing in neuropsychological assessments and psychological injury evaluations. With a career encompassing clinical neuropsychology, psychological injury assessment, and cognitive rehabilitation, he brings a comprehensive understanding of brain function and psychological trauma to his litigation work. His work centers on investigating neuropsychological functioning post-injury, assessing psychological impact from traumatic events, and evaluating the validity of cognitive and emotional claims. Dr. Sembi has been retained in numerous expert witness and consulting engagements across the UK, involving cases of clinical negligence, traumatic brain injury, and psychological disorders. His Doctor of Clinical Psychology from the University of Manchester, along with his Chartered Psychologist 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 neuropsychological and psychiatric assessments.

Marcel O. Pontón, PhD is a forensic neuropsychology expert specializing in traumatic brain injury and psychological trauma assessment. With a career spanning neuropsychological assessment, brain injury rehabilitation, and Spanish-speaking patient evaluation, he brings a culturally informed framework to litigation work. His work centers on investigating neuropsychological impacts, assessing cognitive impairments, and evaluating whether malingering is present in personal injury cases. Dr. Pontón has been retained in numerous expert witness and consulting engagements across Southern California, involving cases of traumatic brain injury, spinal cord injury, and psychological trauma. His Ph.D. in Clinical Psychology from Fuller Graduate School of Psychology, along with his licenses as a Licensed Clinical Psychologist and Qualified Medical Evaluator, 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 neuropsychological injuries and disorders.

PhD BCBA-D LABA CCTP-II

Teresa Herrero Taylor, PhD BCBA-D LABA CCTP-II is a psychology and behavior analysis expert specializing in clinical psychology, special education, and psychological trauma. With a career encompassing roles in educational leadership, clinical practice, and behavior analysis, she brings a multifaceted perspective to her litigation work. Her work centers on investigating psychological trauma impacts, assessing behavioral interventions, and evaluating compliance with educational standards. Ms. Taylor has been retained in numerous expert witness and consulting engagements across New Jersey and Florida, involving cases related to special education, psychological trauma, and behavior analysis. Her Ph.D. in Professional Psychology from the University of Pennsylvania, along with certifications such as Board Certified Behavior Analyst – Doctoral and Certified Clinical Trauma Professional II, 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 psychological and behavioral assessments.

Child and General Psychiatry Expert

Jeffrey Alan Sugar, MD is a child and general psychiatry expert specializing in forensic psychiatry and psychiatric trauma. With a career spanning public and private sector psychiatry, he brings a comprehensive framework to litigation work involving the effects of trauma on child development. His work centers on investigating psychiatric trauma, assessing the psychological effects of abuse, and evaluating whether psychiatric evaluations meet professional standards. Dr. Sugar has been retained in numerous expert witness and consulting engagements across California, involving cases of child custody, psychiatric factors in criminal behavior, and sexual abuse. His M.D. in Medicine from the University of California, San Francisco, along with board certifications in Psychiatry and Child and Adolescent Psychiatry, 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 evaluations and trauma.

Psychologist and President

Deanna Foster, Ph.D. is a forensic psychology expert specializing in psychological evaluations and trauma-related litigation. With extensive experience in assessing psychological disorders and organizational dynamics, she brings a nuanced understanding of psychological impacts in legal contexts. Her work centers on investigating psychological conditions, assessing trauma-related claims, and evaluating whether psychological factors influence legal outcomes. Dr. Foster has been retained in numerous expert witness and consulting engagements across the United States, involving civil litigation matters such as employment disputes, psychological injury claims, and organizational assessments. Her Doctorate in Psychology from the University of Southern California, along with certifications such as the Certified Clinical Trauma Professional (CCTP), 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 psychological disorders and trauma.

VP, Human Factors Practice

Gavin Huntley-Fenner, Ph.D. is a human factors and safety expert specializing in risk perception, hazard communications, and decision-making. With a career spanning research, education, and consulting, he brings a multidisciplinary approach to litigation work, integrating cognitive psychology and real-world applications. His work centers on investigating human behavior, assessing safety protocols, and evaluating whether risk communication strategies meet industry standards. Dr. Huntley-Fenner has been retained in numerous expert witness and consulting engagements across the United States, involving consumer electronics, pharmaceuticals, professional products, and medical devices. His Ph.D. in Brain and Cognitive Sciences from the Massachusetts Institute of Technology, along with his role as a Certified Minimum Continuing Legal Education (MCLE) Provider, 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 human factors and safety.