Colonel Michael J. Oldham was commissioned an Infantry Officer upon graduation from Officer Candidate School 7 May 1962. His first duty assignment was as a Platoon Leader, Company B, 121st Engineer Battalion, Maryland Army National Guard. | His subsequent duty assignments include:  Platoon Leader, Company A 121st Engineer Battalion, Maryland Army National Guard; Executive Officer, Company A, 175th Infantry Regiment, 29th Infantry Division; Commander, Company C, 1st Brigade, Army Training Center, Fort Bragg, North Carolina; Advisor, Infantry Battalion, South Vietnamese Army, IV Corps, Republic of Vietnam; District Advisor, IV Corps, Republic of Vietnam; Senior Army Instructor, Kamehameha Schools (Military Institute),  Honolulu, Hawaii, Assistant S-3, 1st Brigade, 25th Infantry Division, Schofield Barracks, Hawaii; Commander, Company B, 1st Battalion, 27th Infantry, 25th Infantry Division, Schofield Barracks, Hawaii; Brigade S-2 (Intelligence), 3d Brigade, 2d Armored Division, Fort Hood, Texas; Battalion S-3, 2d Battalion, 41st Infantry (Mechanized), 2d Armored Division, Fort Hood, Texas; Plans Officer, G-3 (Plans), III US Corps, Fort Hood, Texas; Deputy District Engineer, U.S. Army Corps of Engineers District, Baltimore, Maryland; Brigade Advisor, 69th Infantry Brigade (Mechanized), Kansas Army National Guard, Topeka, Kansas; Chief, Military Construction Branch, Construction Programs Division, Deputy Chief of Staff, Engineer, U.S. Army Europe and 7th Army, Heidelberg, Germany; Chief, Installations Planning Division, Deputy Chief of Staff, Engineer, U.S. Army Europe and 7th Army, Heidelberg, Germany; and Deputy Commander, North Atlantic Division, U.S. Army Corps of Engineers, New York, New York.