Colonel Thomas Henry Jenkin was commissioned an Infantry Officer upon graduation from Officer Candidate School Class 20-52, 25 July 1952. His first duty assignment was as a training officer, 23rd Armored Infantry Battalion , 7th Armored Division. | His subsequent duty assignments include: FECOM; later assigned to the 15th Infantry Regiment,3rd Infantry Division, Korea; Platoon Leader/Executive Officer B/lst Battalion, Executive Officer, C/1st Battalion, D/1st Battalion; Division Headquarters Defense Platoon Leader, 915' Infantry Division, G4 Section as Division Property Officer, Assistant G4, and the Assistant Chief of Staff G4, Commander 91st Support Battalion, Commander, 4th Brigade 91st Division (Training), Chief of Staff, 91st Division (Training), Assistant Division Commander (Support), 91St Division (Training).