Thomas F. Ellzey was commissioned an Infantry Officer upon graduation from Officer Candidate School on 1 February 1969. His first duty assignment was as Training Officer Company C, 17th Battalion, 4th Combat Support Brigade, Fort Jackson, South Carolina. | His subsequent duty assignments include: Company Executive Officer, Company A, 17th Battalion, 4th Combat Support Brigade, Fort Jackson, South Carolina; Rotary Wing Pilot, Troop B,  2/117th Air Cavalry Squadron, 101st Airborne Division, Camp Eagle, Vietnam; Rifle Platoon Leader, Troop B, 2/17th Air Cavalry Squadron, 101st Airborne Division, Camp Eagle, Vietnam, Company Commander, Company A, 15th Battalion, 4th Combat Support Brigade, Fort Jackson, South Carolina; Battalion S-3, l 5th Battalion, 4th Combat Support Brigade, Fort Jackson, South Carolina; Aviation Platoon Commander, Company B, 82d Aviation Battalion, 82d Airborne Division, Fort Bragg, North Carolina; Aviation Operations Officer, Company B,  82d Aviation Battalion, 82d Airborne Division, Fort Bragg, North Carolina; Division Flight Standardization Officer, Headquarters, 82d Airborne Division, Fort Bragg, North Carolina; Plans and Operations Officer, United States Army Garrison, Camp Zama, Japan; Battalion Executive Officer, 269th Aviation Battalion (Combat), 18th Airborne Corps, Fort Bragg, North Carolina; Commander, 18th Aviation Corps, Fort Bragg, North Carolina; Inspector General, 1st Corps Support Command, Fort Bragg, North Carolina; Staff Leader, CAS3, United States Army Command and General Staff College, Fort Leavenworth, Kansas; Battalion Commander, 4th Battalion, 25th Aviation Regiment; 25th Infantry Division, Schofield Barracks, Hawaii; Army Forces Commander, Operation Sea Angel, Chittagong, Bangladesh; Director, Plans, Training, Mobilization and Security, United States Army Support  Command, Fort ShaRer, Hawaii.