Dr. Gregory I. Mack, Ph.D. is a New York State licensed forensic and clinical psychologist. He is a retired "20-year" NYPD Detective/Police Psychologist and conducted fitness-for-duty evaluations, disability evaluations, pre-employment psychological evaluations, critical incident stress debriefings and counseling services to police officers who were involved in life threatening situations (e.g., police involved shootings, suicide by cop), or who were exposed to other critical incidents (e.g., police suicide; SIDS deaths).

Dr. Mack served as Program Manager/Supervisory Psychologist for the FDR/Montrose Veterans Hospital Substance Abuse Residential Treatment Program (SARTP) and as a Staff Psychologist on the Residential Posttraumatic Stress Unit. He was also employed as a New York City Transit Authority Conductor and Train Operator. New paragraph

Dr. Mack received a Bachelor of Arts degree in forensic psychology in 1989, a Master of Arts degree in forensic psychology from John Jay College in 1991, and a second Master of Arts degree and a Doctor of Philosophy degree in clinical psychology from St. John's University in June 1998 and September 1998, respectively.  He completed internship training at New York University and Bellevue Hospital Medical Centers and at Kirby Forensic Psychiatric Center - The Specialty Track in Forensic Psychology  in August 1996. 

Dr. Mack is an active member of numerous law enforcement and psychological organizations including the Detectives Endowment Association, American Academy of Forensic Sciences, American Psychological Association, and the Police Psychological Services Section of the International Association of Chiefs of Police. He is also the founder of the International Association of Doctoral Law Enforcement Officers (IADLEO). Dr. Mack is a former board member of the New York Association of Black Psychologists, the National Black Police Association,and past member of many other organizations including the National Organization of Black Law Enforcement Executives, Fraternal Order of Police, Patrolmen's Benevolent Association, Mounted Police Association, American College of Forensic Examiners, American Academy of Experts in Traumatic Stress, and a founding past member of the American Police Association.