Colonel Charles Siragusa was commissioned an Infantry Officer upon graduation from Officer Candidate School Class 59, 4 August 1953. His first duty assignment was as Platoon Leader, Company C, 634th Armored Infantry Battalion, 1st Armored Division, Fort Hood, Texas. | His subsequent duty assignments include: Tank Platoon Leader, Company B, 157th Tank Battalion, 49th Armored Division, Houston, Texas; Weapons Platoon Leader, Company B, 1st Battle Group, 143rd Infantry, 36th Infantry Division, Houston, Texas; Executive Officer, Combat Support Company, 1st Battle Group, 143rd Infantry, 36th Infantry Division, Houston, Texas; Publications Officer, Company D, United States Army Infantry School-Department of Nonresident Instruction, Fort Benning, Georgia; S-3 Air, Headquarters and Headquarters Company, 7th Battalion 112th Armor, 49th Armored Division, Houston, Texas; Assistant Chief Briefing Officer, Headquarters, 75th Maneuver Area Command, Houston, Texas; Chief Briefing Officer, Headquarters, 75th Maneuver Area Command, Houston, Texas; Operations and Training Officer, Umpire Group, 75th  Maneuver Area Command, Houston, Texas; Project Officer, Office of the Deputy Chief of Staff, Reserve Forces, Headquarters 4th U.S. Army, Fort Sam Houston, Texas; Assistant Chief Field Operations, Umpire Group, 75th Maneuver Area Command, Houston, Texas; G-3, Umpire Group, 75th Maneuver Area Command, Houston, Texas; Director, Armored Cavalry Exercise Group, 75th Maneuver Area Command, Houston, Texas; Chief of Staff, 75th Maneuver Area Command, Houston, Texas.