Colonel Timothy C. Barrick was commissioned an Infantry Officer upon graduation from Officer Candidate School 27 January 1967. His first duty assignment was as Training officer, Company B, 1st Battalion, 1st Brigade, U.S. Army Infantry Training Center, Fort Benning, Georgia. | His subsequent duty assignments include; Platoon Leader, Delta Company, 1st Battalion, 8th Cavalry, 1st Cavalry Division, Republic of South Vietnam; Assistant S-3 (Liaison Officer), Headquarters, 1st  Brigade, 1st Cavalry Division, Republic of South Vietnam; Commander, Headquarters and Headquarters Company and Company A, 4th Battalion, 1st Infantry Training Center, Fort Benning, Georgia; S-4, 1st Battalion, 31st Infantry, 7th Infantry Division, Republic of South Korea; Logistics Officer, 197th Infantry Brigade, U.S. Army Infantry Center, Fort Benning, Georgia; Instructor, U.S. Army Infantry Center, Fort Benning, Georgia; Instructor, Military Academy, Alabama Army National Guard, Fort McClellan, Alabama; Assistant S-3, 1343d Engineer Battalion, Alabama Army National Guard, Athens, Alabama; Executive Officer, 1343d Engineer Battalion, Alabama Army National Guard, Athens, Alabama;  S-1, Headquarters, 31st Armored Brigade, Alabama Army National Guard, Northport, Alabama; Executive Officer, Headquarters, 31st Armored Brigade, Alabama Army National Guard, Northport, Alabama; G-3, Headquarters, Troop Command, Alabama, Army National Guard, Montgomery, Alabama; and Chief of Staff, Headquarters, Troop Command, State Area Command, Alabama Army National Guard, Montgomery, Alabama.