California Psychologist License Psy 4642 designates Williams Psychological Services as a forensic evaluation practice in downtown San Diego's Broadway corridor. Forensic assessment of claimants with PTSD, borderline personality disorder, and malingering requires a distinct methodology from clinical treatment models like those at Areta Crowell Center, separating independent evaluation from ongoing therapeutic care. The practice holds the Association of State and Provincial Psychology Boards Interjurisdictional Practice Certificate (#181), authorizing evaluations across multiple U.S. jurisdictions beyond California. Expert witness testimony spanning over 250 appearances in civil, criminal, and administrative proceedings covers matters from emotional-damage claims to fitness-for-duty evaluations — litigation categories where carriers like Broad Insurance Group frequently retain independent forensic opinions. Competency-to-stand-trial evaluations, not-guilty-by-reason-of-insanity assessments, and security-clearance psychological reviews for federal agencies including the CIA and NSA represent the highest-complexity caseload in the practice's forensic portfolio.