Park Dietz, M.D., M.P.H., Ph.D.
Founder and President, Threat Assessment Group, Inc.
Educated at Cornell and Johns Hopkins, Dr. Dietz simultaneously earned an M.D., a master’s degree in public health, and a Ph.D. in sociology. He trained in psychiatry at the Johns Hopkins Hospital and in forensic psychiatry at the University of Pennsylvania. He served as an Assistant Professor of Psychiatry at the Harvard Medical School and as Professor of Law and Professor of Behavioral Medicine and Psychiatry at the University of Virginia. He is now Clinical Professor of Psychiatry and Biobehavioral Sciences at the UCLA David Geffen School of Medicine. He has also been a Visiting Professor of Psychiatry at the University of Hawaii and a Distinguished Fellow in the Program in Psychology and Law at the University of California, Irvine.
Dr. Dietz is the founder and head of both the forensic consulting firm of Park Dietz & Associates and the first company devoted to workplace violence prevention, Threat Assessment Group, both of which are headquartered in Newport Beach, California. Dr. Dietz was named one of the “Top 25 Most Influential People in the Security Industry” by Security magazine. In 2014, Biography.com listed Dr. Dietz among the 10 most famous psychiatrists in history.
Dr. Dietz has testified and/or consulted in all 50 states, participating in such notable cases as those involving the assassination attempts on President Reagan and on Congresswoman Gabrielle Giffords, Jeffrey Dahmer and more than 25 other serial killers, Dylann Roof and more than a dozen other mass murderers, Dzhokhar Tsarnaev (Boston Marathon Bombing), Susan Smith, Polly Klaas, the Menendez brothers (retrial), John DuPont, the Prom Mom, Andrea Yates, the Unabomber, the shootings at the Vera Wang Bridal Salon, Empire State Building, and U.S. Capital, the DC sniper cases, and the school shootings at Columbine and elsewhere.
Threat Assessment Group (TAG) helps corporations, government agencies, and educational institutions develop programs to prevent and manage violence and other misconduct through management consulting, training, and case consultation. TAG is the primary provider to the Fortune 500, and hundreds of other organizations use TAG's services in managing threats, domestic violence, stalking, and other misconduct.
Dr. Dietz is a Past President of the American Academy of Psychiatry and the Law, a Distinguished Life Fellow of the American Psychiatric Association, and a Fellow of the American Academy of Forensic Sciences. He has been a forensic psychiatrist for the FBI’s Behavioral Science Unit and Behavioral Analysis Units and for the New York State Police Forensic Sciences Unit and has consulted to the CIA, U.S. Secret Service, DOJ, DEA, U.S. Marshall’s Service, IRS, and International War Crimes Tribunal. He has authored more than 100 publications.