Colonel Gregory Darling was commissioned a Signal Corps Officer upon graduation from Officer Candidate School Class 14-49, 23 September 1949. His first duty assignment was as a Student Officer, The Signal School, Fort Monmouth, New Jersey. | His subsequent duty assignments include: Signal Center Officer Fixed Station, 7774 Signal Battalion, Heidelburg, Germany; Radio Teletype Officer, 17th Signal Battalion, Karlsruhe, Germany; Signal Center Officer Field, 17th Signal Battalion, Karlsruhe, Germany; Executive Officer, Message Center Company, 17th Signal Battalion, Karlsruhe, Germany; Platoon Leader, 29th Signal Const. Battalion, Karlsruhe, Germany; Student Company Commander, The Southeastern Signal School, Camp Gordon, Georgia; OIC Comcenter Headquarters Eighth Army, 304th Signal Battalion, Seoul, Korea; Signal Unit Advisor, USA Advisory Group (U.S. Army Reserve), Raleigh, North Carolina; Battle Group Signal Officer, 187th Airborne Battle Group, Fort Bragg, North Carolina; Battle Group Signal Officer, 2nd Airborne Battle Group, 503 Infantry, Okinawa; Bde S-1, 173rd Airborne Brigade, Okinawa; Chief Communications Branch (Special Forces), U.S. Army Special Warfare School, Fort Bragg, North Carolina; Brigade Signal Officer, 173 Airborne Brigade, Bien Hoa, Republic of Vietnam; Chief, Communications Branch (Special Forces), U.S. Army Special Warfare School, Fort Bragg, North Carolina; Brigade Signal Officer 173d Airborne Brigade, Bien Hoa, Republic of Vietnam; Chief, Combat Communications Branch, Office Assistant Chief of Staff Central European Headquarters Department of Army, The Pentagon; Commander (Division Signal Office 8th Infantry Division), 8th Signal Battalion, Bad Kreuznach, Germany; Executive Officer Army Chief of Staff, J-6, Headquarters Military Assistant Command Vietnam, Republic of Vietnam; Director, Plans and Analysis, Headquarters U.S. Army Electronics Commander, Fort Monmouth, New Jersey; Army Chief of Staff Central European, Headquarter, Allied Forces South Eastern Europe (North Atlantic Treaty Organization), Izmir, Turkey; Army Chief of Staff, Central European Headquarters, 5 Corps (U.S. Army Reserve Europe), Frankfurt, Germany; D.CSPer Special Review Board, U.S. Army, Military Personnel Center, Alexandria, Virginia. | At the time of his induction Colonel Darling was a self-employed Associate Broker for RE/MAX Choice in Fairfax, Virginia.