Colonel William R. Halpin was commissioned a Military Intelligence Officer upon graduation from Officer Candidate School, 3June 1968. His first duty assignment was as Provincial Area Intelligence Officer, Military Area Command Vietnam Team, Quang Ngai, Republic of Vietnam. | His subsequent duty assignments include: Team Chief, 1st Battalion, 525th Military Intelligence Group, Phu Bai and Danang, Vietnam; Civil Affairs and Political Officer, Detachment A-105, 5th Special Forces Group (Airborne), Nong Son, Vietnam; Desk Officer, 430th Military Intelligence Battalion, Munich, Germany; Area Intelligence Officer and Team Chief, 430th Military Intelligence Battalion, Munich, Germany; Special Operations Officer, Defense Intelligence Agency, Washington, D.C.; Special Operations Officer, U.S. Special Operations Command, MacDill Air Force Base, Tampa, Florida; Chief, Human Intelligence Restructure Task Force, U.S. European Command, Stuttgart, Germany; Assistant Deputy Chief of Staff for Operations, U.S. Army Intelligence and Security Command, Fort Belvoir, Virginia; Special Assistant to the Deputy Director, Defense Human Intelligence Service, Washington, D.C.; Individual Mobilization Augmentee assigned to the Department of the Defense; U.S. Army Reserve attache to the United Knigdom and Commander of the Nation-wide Joint Unit.