Colonel Nicholas W. Hubbell was commissioned an Infantry Officer upon graduation from Officer Candidate School Class 44-67, 1 August 1967. His first duty assignment was as Mortar Platoon Leader, B Company, 2nd Battalion, 506th Airborne Infantry, 101st Airborne Division, Fort Campbell, Kentucky. | His subsequent duty assignments include: Mortar Platoon Leader, B Company, 2nd Battalion, 506th Airborne Infantry, 101st Airborne Division, Republic of Vietnam; Military Advisor, Mobile Advisory Team IV-63, Military Assistance Command, Republic of Vietnam; Rifle Platoon Leader, B Company, 4th Battalion, 503rd Airborne Infantry, 173rd Airborne Brigade, Republic of Vietnam; Commander, Operational Detachment B-4, B Company, 3rd Special Forces Group (Airborne), Fort Bragg, North Carolina; Operations Officer, B Company, 7th Special Forces Group (Airborne), Fort Bragg, North Carolina; Assistant Operations Officer, Headquarters and Headquarters Company, 11th Special Forces Group (Airborne), Tappan, New York; Commander, Operational Detachment (B-1), B Company, 11th Special Forces Group (Airborne), Tappan, New York; Adjutant, B Company, 1st Special Forces Battalion, 11th Special Forces Group (Airborne), Tappan, New York; Pipeline Construction Officer, Headquarters and Headquarters Company, 854th Engineer Battalion, Kingston, New York; Commander, B Company, 854th Engineer Battalion, Newburgh, New York; Instructor, Officer Advanced Course, 2163rd United States Army Reserve School, Bronx, New York; Instructor, Officer Advanced Course, 2071st United States Army Reserve School, Owings Mill, Maryland; Training Management Officer, 2071st United States Army Reserve School, Owings Mill, Maryland; Director of Administration, 510th Theater Army Support Group, Baltimore, Maryland; Commander, 1st Special Forces Battalion, 11th Special Forces Group (Airborne), Newburgh, New York; Chief, Infantry Team, 78th Maneuver Training Command, 78th Division (Training), Fort Dix, New Jersey; Deputy Chief of Staff, Logistics, 79th United States Army Reserve Command, Willow Grove Air Station, Pennsylvania; Commander, 5th Field Exercise Brigade, 78th Training Division, Baltimore, Maryland; Deputy Chief of Staff Operations, U.S. Army Special Operations Command, Fort Bragg, North Carolina.