Party affiliation: Republican
Assistant engineer Phoenix Bridge Company, Philadelphia, 1885-1891. Chief engineer Union Iron Works, New York, 1891-1893. Member Boller, Hodge & Baird, consulting engrs., since 1899.
President The Porterfield Construction Company Designed municipal bridge over Mississippi River, at St. Louis, G.N. R.R. bridge, Duluth, Minnesota, C.,Rhode Island&P. bridge, Little Rock, Arkansas, all bridges for Choctaw, Oklahoma & Gulf R.R., National Railroad Company of Mexico, and for Wabash-Pittsburgh Terminal Company, including the large cantilever bridges over Monongahela River and Ohio River, the former the largest R.R. bridge in the United States Engineer for City of New York for Melrose Avenue viaduct, 96th St. bridge. Commissioner for Blackwell’s Island bridge and Manhattan Suspension bridge over East River. Construction engineering for Brooklyn Rapid Transit County, New York and New Jersey Interstate Bridge and Tunnel Commission, and many other corporations, etc.
Appointed public service commissioner, State of New York, January 1916, resigned July 1917. Commissioned major Engineer R.C.U.S.A., and director of rys. in France, July since 1917.