After leaving school was clerk in wholesale white goods and notion business in Philadelphia. With brother, Jeremiah J., in same line, in firm of Sullivan & Brother, 1886-1907. Active in many underwritings, passenger railway consolidations and their development in Philadelphia and other cities.
Vice president Midvale Steel Company, 1889-1915. President Market St. National Bank of Philadelphia. Director Frankford & Southwark Passenger Railroad Company, Green & Coates Passenger Railway Company, Real Estate Trust Company.
Manager and director Lehigh Coal & Navigation Company. Director Lehigh & N.E. Railroad Company, Alliance Coal Mining Company, Cranberry Creek Coal Company, Panther Valley Water Company, Nesquehoning Valley Railroad Company.