Began as electrical and mechanic engineer. Was president Riker Electric Motor Company. Was designer the Locomobile.
Designed and built an electrical tricycle, 1884, 4-wheeled electrical motor car, 1895, gasoline car, 1902, car which won Vanderbilt Cup race, 1908. Established world’s speed record on Long Island for electric cars, 1899, which was held for 10 years. President Ventilouvre Company.
Appointed member Naval consulting board, 1915 (Chairman of Commission on internal combustion motors).