 Stewart served from January 3, 1935 until January 3, 1937, during the first administration of U.S. President Franklin D. Roosevelt.Ten years later he became a member of the staff of the United States Senate Committee on the District of Columbia, and served there from 1947 until 1951.He was special engineer to the lands division of the United States Department of Justice and Corps of Engineers in 1952/1953, and was a civil engineer in Hollywood, Florida in 1954.