Administrator of Civil Aeronautics (now the Federal Aviation Administration) and Chairman of the U.S. Civil Aeronautics Board (now National Transportation Safety Board) under President Harry S. Truman in the early 1950s.
This description refers to a person who held dual roles during the early 1950s: overseeing civil aviation regulations as both the Administrator of Civil Aeronautics and Chairman of the U.S. Civil Aeronautics Board, which later evolved into the Federal Aviation Administration (FAA) and the National Transportation Safety Board (NTSB).