Colonel (later Lieutenant General) E. J. D’Ambrosio was commissioned an Infantry Officer upon graduation from Officer Candidate School on 9 August 1947, class number 8. His first duty assignment was as Training Officer, Infantry Replacement Training Center, Camp Blanding, Florida. | His subsequent duty assignments include:  Stock Control Officer, 229th Ordnance Base Depot, Pusan, Korea; Stock Control Officer, 78th Stock Control Detachment, Yokohama, Japan; Chief, Demand Branch, Ordnance Demand Analysis Agency, Raritan Arsenal, New Jersey; Assistant S-3 (Air), Lawson Army Airfield, Fort Benning, Georgia; Executive Officer, 8th Army Flight Detachment, Seoul, Korea; commanding Officer, 8th Army Flight Detachment; Operations Officer, Aviation Section and Assistant Secretary of the General Staff, Headquarters, Fifth United States Army, Chic II; Instructor, Command and General Staff College, Fort Leavenworth, Kansas; Assistant Chief of Staff, Fort Leavenworth, Kansas; Commanding Officer, 212th combat Aviation Battalion, Fort Campbell, Kentucky; Chief, Study Processing Group, Office of the Assistant Vice Chief of Staff. | His awards and decorations include:  Distinguish Flying Cross, Vietnamese Cross of Gallantry (Gold Star), Army Commendation Medal ( I Oak Leaf Cluster), Air Medal (5 Oak Leaf Cluster), Meritorious Service Medal, Bronze Star, Legion of Merit.