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Expert Bio

Primary Area of Expertise

Post Traumatic Stress Disorder

Expert Witness Profile

Dr. Williams conducts independent psychological evaluations of:

  • Emotional Damage Claims (including PTSD) in Civil Litigation
  • Security clearances
  • Fitness to practice (for license holders) and fitness for duty
  • Immigration waivers (including Adam Walsh Act)
  • Competency to Stand Trail
  • Insanity Defense/Mental Health Diversion

Dr. Williams testifies nationwide on the standard of care (psychotherapy malpractice)

Dr. Williams is a graduate of the University of California, Berkeley where he obtained his doctorate in psychology.  Dr. Williams previously had graduated Phi Beta Kappa and Summa Cum Laude from UCLA, with Highest Honors in Psychology.  He has been a licensed psychologist in California since 1976 and has never been subject to any disciplinary proceeding. Dr. Williams practiced as a clinical psychologist and manager at The Kaiser Permanente Medical Center in Santa Clara, California for 27 years.  At Kaiser, Dr. Williams treated a wide range of individuals, including those with “dual diagnoses”—individuals who suffered from a substance abuse diagnosis in addition to a primary psychiatric diagnosis.  Dr. Williams was chair of the Psychiatry Department Peer Review Committee at that medical center for 11 years.  For the final three years of his time at Kaiser, Dr. Williams managed the Intensive Outpatient Treatment Program (IOP), a day-treatment program for individuals with severe mental illness, including those with co-occurring substance abuse problems. Subsequently, Dr. Williams was employed by the California Department of Corrections and Rehabilitation, Board of Parole Hearings, evaluating life-term inmates for parole suitability. 

Dr. Williams is licensed in California and Virginia. Dr. Williams is a consultant to the Hostage Negotiation Team of the Campbell, California Police department and serves on the Oversight Committee of the Lawyer Assistance Program of the State Bar of California.

Dr. Williams has testified 241 times and has never failed to qualify as an expert witness.

Education & Licenses

Ph.D., Psychology, University of California, Berkeley; Licensed in California and Virginia