Colonel Steven H. Philbrick was commissioned an Infantry Officer upon graduation from Officer Candidate School Class 1-72, 20 January 1972. His first duty assignment was as Executive Officer, Operational Detachment A (ODA) 311, 3rd Battalion, 10th Special Forces Group (SFG), Fort Devens, Massachusetts. | His subsequent duty assignments include: Commander, Operational Detachment A 311 (SCUBA), 3rd Battalion, 10th Special Forces Group, Fort Devens, Massachusetts; Commander, Company A, 1/32 Infantry, 2nd Infantry Division (2ID), Camp Casey, Korea; S-3 Air, 1/32 Infantry, 2d ID, Camp Casey, Korea; Deputy Commander, Cheju-Do Training and Recreation Center, 2d Infantry Division, Cheju-Do, Korea; Commander, Company B, 14th Battalion, 4th Advanced Individual Training (AIT)  Brigade, Fort Jackson, South Carolina; Training Officer, Directorate of  Plans and Training, Fort Jackson, South Carolina; Commander, Company A, 2nd Battalion, 7th Special Forces Group, Fort Bragg, North Carolina; Chief, G3 Training, John F. Kennedy Special Warfare Center, Fort Bragg, North Carolina; Assistant Professor of Military Science, Lafayette College, Easton, Pennsylvania; Commander, U.S. Army Special Forces Detachment-Korea, Yongsan, Korea; Executive Officer, 1st Special Operations Command (SOCOM), Berlin, Germany; Commander, 3rd Battalion, 10th Special Forces Group, Fort Devens, Massachusetts; Liaison Officer to Central Intelligence Agency (CIA), U.S. Special Operations Command, Langley, Virginia; Commander, 5th Brigade, 4th Reserve Officers’ Training Corps (ROTC) Region, Fort Sam Houston, Texas.