Chemist in laboratory of Thomas A. Edison, 1879. Electrician New York factory Western Elec. Company, 1879-1882, assistant electrician United States Electronics Lighting Company, 1882.
With Parker Electric Lighting Company, 1882-1884. With United States Electric Lighting Company, 1884-1886. Electrician Newark shops of Westinghouse Elec.
Company until January 1892. With Stanley Laboratory Company, 1892-1895. Consulting engineer for Stanley Electric Manufacturing Company, Pittsfield, and Stanley Instrument Company, Great Barrington, Massachusetts, until 1905.
Founded Telelectric Company, 1905, president until 1910. Introduced Cooke-Kelly food drying process which preserves primal freshness. Has received over 90 United States patents for utilization of electricity, covering apparatus for generating transmitting, distributing and measuring.
First to produce stable iron for electromagnetic purposes. Pioneer in long distance, high tension transmission work.