Mr. Dupuy came to Rutherford, N. J., in 1876, and for five years was employed in a watch factory. During this time he began in a small way to manufacture baseballs and other sporting goods, eventually becoming very successful in this business. His factory was in Rutherford and his salesroom was in New York. At one time he had in all nearly one hundred hands employed and in one season manufactured 365,000 dozen balls. He conducted this business and at the same time a dry goods store in Rutherford until the panic of 1893 caused him to relinquish both enterprises.

As an official Mr. Dupuy's career has also been successful. He served the Borough of Rutherford as Constable from 1880 to 1885, and as Town Collector from 1886 to 1888, being the only Democrat elected on that ticket. He was Coroner from 1887 to 1889, running ahead of his ticket in that election. He was elected Justice of the Peace in 1882, serving five years, and was again elected in 1893. In 1891 he was elected Assemblyman from the Second Assembly District and was re-elected the following year. He has served as Chief of the State Detective Bureau, and has been prominent in fire circles, having served in the department as Foreman, Chief, and President of the organization.