 In all, Warburton served from January 3, 1953 until January 3, 1955, all but the first 17 days falling during the administration of U.S. President Dwight D. Eisenhower.Following his congressional service, Warburton was appointed special assistant to United States Secretary of Labor, James P. Mitchell from 1955 until 1957, general counsel for the Post Office Department from 1957 until 1961, and minority counsel to the U.S. House Government Operations subcommittee, serving there from 1961 to 1964.Subsequently, he became a resident of Frankford, Delaware and was executive director of the American Orthotics and Prosthetics Association and the American Board for Certification in Orthotics and Prosthetics.