Colonel Donald C. Cook, Jr. was commissioned a Military Police Officer upon graduation from Officer Candidate School 16 November 1967. His first duty assignment was as the Operations Officer and Training Officer, Arsenal Support Operations Division, Redstone Arsenal, Alabama. | His subsequent duty assignments include: Platoon Leader, 29lst Military Police Company, Redstone Arsenal, Alabama; Platoon Leader, 458th Transportation Company, Republic of Vietnam Platoon Leader, 560th Military Police Company, Republic of Vietnam; Provost Marshal, U.S. Army Pictorial Center, Long Island, New York; Commander, Company D, 11th Battalion, 4th Advanced Individual Training Brigade, Fort Gordon, Georgia; Executive Officer, 11th Battalion, 4th Advanced Individual Training Brigade, Fort Gordon, Georgia; Military Police Branch Advisor, Readiness Region I, West Point, New York; Commander, 2nd Unit, U.S. Army Reserve Brigade, Fort Riley, Kansas; Provost Marshal, Fort Wainwright, Alaska; Terrorism and Crime Prevention Officer, Headquarters, Training Doctrine and Command, Fort Monroe, Virginia; Provost Marshal, Fort Monroe, Virginia; Operations Officer, Drug Suppression Operations Center, Mannehein, Germany; Commander, Law Enforcement Battalion, Fort Belvoir, Virginia; and Commander, U.S. Army Service Center for the Armed Forces, The Pentagon.