Dr. Marcus Van Sickle is a Licensed and Board-Certified Psychologist specializing in Forensic, Cognitive Behavioral, and Operational Psychology. He provides expert forensic evaluations, compelling expert testimony, and comprehensive behavioral threat assessment and management. As an ATAP Certified Threat Manager, Dr. Van Sickle brings specialized expertise in risk assessment and threat mitigation.

Dr. Van Sickle currently supports military, federal, and state court systems conducting risk and mitigation evaluations, and providing expert testimony in both criminal and civil cases. He completed a rigorous two-year accredited Forensic Psychology Fellowship at Walter Reed National Military Medical Center, conducting high-profile evaluations including competency (RCM 706), risk assessments, fitness for duty, and memory-related forensic evaluations. He has delivered expert testimony globally in U.S. Military Courts-Martial, specializing in cases involving alcohol and memory, counterintuitive victim behavior, and risk assessment and management.

Dr. Van Sickle's distinguished military career began as an enlisted Marine, serving honorably with deployment to Iraq before transitioning to Navy Medical Service Corps upon completing his Ph.D. at the Uniformed Services University of the Health Sciences. While serving, he held leadership roles in outpatient and intensive outpatient clinical settings, established innovative embedded mental health programs at Guantanamo Bay and Pearl Harbor, and operational psychology in the areas of assessment and selection and cyberspace operations. He completed his military service as the Command Psychologist for Marine Forces Cyberspace Command, blending expertise in forensic, operational, and clinical psychology in collaboration with international teams in support of national security operations.

Dr. Van Sickle also holds a post-doctoral M.S. in Clinical Psychopharmacology and is a licensed Advanced Practice Medical (prescribing) psychologist, which informs his treatment and evaluations as well as expert consultation and testimony. Beyond practice, Dr. Van Sickle is an active leader in multiple professional organizations and is actively engaged in research and teaching on forensic and resilience areas.

For more information or to request his curriculum vitae and fee schedule, please contact Dr. Van Sickle directly.