Colonel Carmen J. Spencer was commissioned a Chemical Officer upon graduation from Officer Candidate School Class 3-74, 23 August 1974. His first duty assignment was a Platoon Leader, 1st Battalion, 19th Infantry, 25th Infantry Division, Schofield Barracks, Hawaii. | His subsequent duty assignments include: Division Artillery Chemical Officer, and Commander, 48th Chemical Detachment, 25th Infantry Division, Schofield Barracks, Hawaii; Combat Development Staff Officer, Headquarters, Training and Doctrine Command, Fort Monroe, Virginia; Commander, 45th Chemical Company, and Division Chemical Officer, 5th Infantry Division, Fort Polk, Louisiana; Personnel Assignments Officer, Headquarters, Personnel Command, Alexandria, Virginia; Staff Officer, Headquarters Department of the Army, Office of the Deputy Chief of Staff for Operations and Plans, Pentagon, Washington, D.C.; Executive Officer to the Assistant Deputy Chief of Staff for Operations and Plans (Force Development), Headquarters, Department of the Army, Pentagon, Washington, D.C.; Commander, Pueblo Army Depot, Pueblo, Colorado; Chief, Nuclear Biological Chemical Defense Division, Headquarters Department of the Army Office of the Deputy Chief of Staff Operations, Pentagon, Washington D.C; Commander, U.S. Army Chemical Activity Pacific, Johnston Island. | At the time of his induction, Colonel Spencer was serving as Director, Chemical & Biological Defense Programs, Office of the Secretary of Defense, The Pentagon, Washington D.C.