Conversation so far:
What did Paul Tibbets do after the war?
Paul Tibbets and the 509th Composite Group returned to the United States on 6 November 1945, and was stationed at Roswell Army Airfield, New Mexico.
What did Paul Tibbets do in New Mexico?
Paul Tibbets was a technical advisor to the 1946 Operation Crossroads nuclear tests at Bikini Atoll in the Pacific
Did anything happen with Paul Tibbets and his crew at Bikini Atoll?
Paul Tibbets and his Enola Gay crew were not chosen to drop another atomic bomb
Did Paul Tibbets and his Enola Gay crew drop a first atomic bomb?
Paul Tibbets is best known as the pilot who flew the B-29 Superfortress, Enola Gay, when it dropped the first of two atomic bombs used in warfare against Japan.
Did Paul Tibbets work with anyone else?
Paul Tibbets was posted to the Directorate of Requirements at Air Force Headquarters at the Pentagon in 1947.

Question: what did he do there?
Self-contained rewrite: What did Paul Tibbets do at the Air Force Headquarters at the Pentagon?