Instructor California Institute Technology, 1932-1937. Consultant aero. engineer, 1934-1938. Chief of aerodynamics Vultee Aircraft, Inc., 1938-1942.
Assistant chief engineer Avion, Inc., 1942-1944. General manager Alvin R. Adams & Associates, 1944-1948. Director, executive assistant to Chairman of the Board Consolidated Vultee Aircraft Corporation, 1947-1953.
Vice-president, director Airfleets Inc., 1949-1956, San Diego Corporation, 1952-1956, Nut-Shel Company, 1952-1956, Hidden Splendor Mining Company, 1954-1958. Vice president Atlas Corporation, 1954-1958. Vice-president, director MVT Industries, Inc., 1960-1964.
Vice president Sonico, Inc., 1964-1969. President Via Computer, Inc., 1969-1982. Associate California Institute Technology, 1975-1982.