Brigadier General Collis N. Phillips was commissioned an Infantry Officer upon graduation from Officer Candidate School Class 53, 30 October 1969. His first duty assignment was as Executive Officer, Company D, United States Army Reception Station, Fort Bragg, North Carolina.| His subsequent duty assignments include: Commander, United States Army Reception Station, Fort Bragg, North Carolina; Motor Officer, 503d Military Police Battalion, Fort Bragg, North Carolina; Control Group (Reinforcement); Senior Instructor, Military Occupational Specialty Department, 2070th United States Army Reserve Forces School, Fort Belvoir, Virginia; Labor Officer, Assistant Chief of Staff, Services, 310th Theater Support Command, Fort Belvoir, Virginia; Commander, 2d Battalion, 317th Regiment, 1st Brigade, 80th Division (Training), Alexandria, Virginia; Deputy Commander, 2d Brigade, 80th Division (Training) Salem, Virginia; Assistant Chief of Staff, Services, 310th Theater Support Command, Fort Belvoir, Virginia; Deputy Chief of Staff, Personnel, 310th Theater Support Command, Fort Belvoir, Virginia; Commander, 300th Area Support Group, Fort Lee, Virginia; Chief of Staff, 310th Theater Support Command, Fort Belvoir, Virginia; Commander, 65th United States Army Regional Support Command, Fort Buchanan, Puerto Rico.