1 daughter, Dorothy Susan. Elec. work, Scotland and United States. With New York Edison Company, Union Metallic Cartridge Company (Bridgeport, Connecticut), Detroit Edison Company, 1902-1915.
With Curtiss Aeroplane Company, Buffalo, New York, 1916. Chief engineer L.W.F. Engineering Company, College Point, Long Island, New York, 1917-1918. Aero engineer in charge aero specifications for Bureau Construction and Repair, Navy Department, Washington, 1919-1920.
Member firm A. & D. R. Black, consultant aero engrs., 1920-1922. Consultant air transport and industrial engineer from 1922. President Black & Bigelow, Inc., 1928-1930.
Free lance writer, 1931-1932. Engineer and special writer The Port of New York Authority, 1933-1939. Engineer Republic Aviation Corporation, Farmingdale, New York, 1940-1941.
Snead & Company, aeronautics div., 1942. Simmonds Aerocessories, Inc., 1943-1945, consultant engineer from 1946. Designed airplane in which 1st Liberty engine was installed, August 1917.
Cons. engineer United States Air Mail Service, 1921.