 Sitton then joined the Organization of the Joint Chiefs of Staff, Washington, D.C., in the Operations Directorate, where he was assistant deputy director for operations for the National Military Command Center; then chief, Current Operations Branch; and lastly chief, Strategic Operations Division.In June 1970 Sitton assumed duties as commander of the 17th Bombardment Wing, SAC, Wright-Patterson Air Force Base, Ohio, and in May 1971 was named commander of the 19th Air Division, SAC, with headquarters at Carswell Air Force Base, Texas.He assumed duties as assistant deputy chief of staff for plans, Strategic Air Command, at Offutt Air Force Base, Neb., in January 1972; became deputy chief of staff for plans in March 1973; and assumed duties as deputy chief of staff for operations in September 1973.