Colonel Jack C. Mason was commissioned an Infantry Officer upon graduation from Officer Candidate School Class RC-02. | His subsequent duty assignments include: Executive Officer, Company B, 2d Battalion, 333d Infantry Regiment, 2d Brigade, 70th Division; Executive Officer, Co. D, 2d Battalion, 333d Infantry Regiment, 70th Division; Commander, Co C, 2d Battalion, 333d Infantry Regiment, 70th Division; Aide-de-Camp to the Commanding General, 70th Division. S1, 1st Brigade, 70th Division; Plans and Training Officer, D.CSPER, 70th Division; S3, 3rd Battalion, 339th Infantry Regiment, 70th Division; CGSC Instructor, 12th Battalion, 6th Brigade, 84th Division; Shift Leader, Emergency Operations Center, Fort Dix, New Jersey; Shift Leader, Emergency Operation Center TACOM, Warren, Michigan; Action Officer, J5-CCC, U.S. Central Command, MacDill Air Force Base, Florida; U.S. Central Command LNO to Combined Forces Command- Afghanistan; Executive Officer, J5-CCC, U.S. Central Command, MacDill Air Force Base, Florida; ILE Instructor, 11/95th Battalion, 2d Brigade, 104th Division; Commander, 11/95th Battalion, 70th Division, 84th Training Command; Action Officer, Army Materiel Command, Redstone Arsenal, Alabama; Action Officer, TACOM Life Cycle Management Command, Warren Michigan. | Colonel Mason attended: Infantry Officer Basic Course, the Infantry Officer Advanced Course, Master Fitness Training Course, Combined Armed Services Staff School, U.S. Army Command and General Staff School, the Faculty Development Training Course, the Canadian Land Forces Militia Command & Staff College, the Reserve Component National Security Course, National Defense University and the Reserve Component Security Issues Seminar and the United States Army War College. | His military awards and decorations include: the Meritorious Service Medal (1 Oak Leaf Cluster), Joint Service Commendation Medal (1 Oak Leaf Cluster), Army Commendation Medal (2 Oak Leaf Cluster), Army Achievement Medal (4 Oak Leaf Cluster), Good Conduct Medal, Afghanistan Campaign Medal (1 Campaign Star), Army Reserve Components Achievement Medal (8 Oak Leaf Cluster), National Defense Service Medal, Armed Forces Reserve Medal with Gold Hourglass, "M-3" Device, NATO Medal, Noncommissioned Officer Development Ribbon, Overseas Service Ribbon, Army Reserve Component Overseas Training Ribbon, Joint Meritorious Unit Award, Combat Action Badge, Drill Sergeant Badge.