Registered professional engineer, Washington. Chief engineer Crosley Aircraft Company, Cincinnati, 1929-1931. Aeronautical engineer Ford Motor Company, Dearborn, Michigan, 1931-1932, Curtiss Aeroplane & Motor Company, Buffalo, 1932-1933.
Designer flight test engineer Stinson Aircraft Company, Wayne, Michigan, 1933-1937. With Federal Aviation Administration, 1937-1970, chief project officer Flight Standards Service, 1945-1961, chief engineer and safety div. Aircraft Development Service, 1961-1970.
Vice president engineering Flight Safety Foundation, Arlington, Virginia, 1970-1972. United States technical advisor Miles-Phoenix, Limited, United Kingdom, 1976-1984. Lecturer American University, Washington, 1952-1957, University Maryland, College Park, 1970-1971.
Advisor United States Air Force, Dayton, Ohio, 1963-1965. Committee member National Advisory Committee for Aeronautics, Washington, 1944-1955, 1960-1968.
Author: Safety in General Aviation, 1971. A Letter to Sarah, 1983. Donovan Scholar University Michigan, 1928.
Distinguished Alumnus fellow Royal Aeronautical Society, United Kingdom, 1953, American Institute of Aeronautics and Astronautics, Society Automotive Engineers. Recipient technical writing award Air Traffic Control Association, Inc., 1984.