Chaplain (Colonel) Douglas B. McCullough was commissioned as an Infantry Officer upon graduation from Officer Candidate School Class 16-70, 17 July 1970. His first duty assignment was Adjutant, Detachment B, Company A, 8th Special Forces Group (Airborne), Fort Gulick, Panama Canal Zone. | His subsequent duty assignments include: Platoon Leader, Company A, 1st Battalion, 3rd Brigade 1st Cavalry Division, Vietnam; Detachment Commander, Operational Detachment 5, Company B, 20th Special Forces (A), Jackson, Mississippi; Instructor, 3390th U.S. Army Reserve School, Jackson, Mississippi; Assistant Battalion Chaplain, 3rd Brigade, 82nd Airborne Division, Fort Bragg, North Carolina; Plans and Policy Chaplain, 18th Airborne Corp, Assistant Staff Chaplain, 1st Special Operations Command, Fort Bragg, North Carolina; Post Chaplain, Headquarters, United States Army Europe, Brunssum, Netherlands; Recruiting Chaplain, Headquarters, Fourth United States Army, Fort Sheridan, Illinois; Deputy Staff Chaplain, 1st Special Forces Command, Cross Cultural Chaplain, Headquarters, 18th Airborne Corps Fort Bragg, North Carolina; Assistant Post Chaplain, Garrison Chaplain, Fort Monroe, Wisconsin; Chaplain Mobilization Trainer, Chaplain Pastoral Coordinator, United States Army Special Operations Command, Fort Bragg, North Carolina; Instructor, Staff Officer, United States Chaplain Center and School, Fort Jackson, South Carolina; Post Chaplain, Fort A.P. Hill, Virginia; Army Chief of Chaplains, Pentagon, Washington, D.C.