Party affiliation: Republican
Instructor mechanic engineering University of Pennsylvania, 1900-1902. Assistant steam engineer Cambria Steel Company, Johnstown, Pennsylvania, 1902-1903, assistant chief draftsman, 1903-1906, engineer tests, 1906-1908, assistant chief engineer, 1908-1912, chief engineer, 1912-1914. Construction engineering, Johnstown, Pennsylvania, 1914-1915.
Chief engineer and manager turbine department Southwark Foundry & Machinery Company, Philadelphia, 1915-1916. Member firm Perin & Marshall, consultant engrs., specializing in steel plants, New York City, 1916-1931. Construction engineering, New York City, 1931-1933.
Construction engineering, San Francisco, 1934-1950, Palo Alto, California, since 1950.
Fellow American Society of Mechanical Engineers, American Association for the Advancement of Science. Member American Institute Mining and Metall, Engineers American Iron and Steel Institute, British Iron and Steel Institute, American Economics Association, American Iron and Steel Engineers, Mining and Metallurgical Society American, Kappa Sigma, Sigma Xi, Beta Gamma Sigma. Club: Engineers (San Francisco).