Went to Netherlands, East Indies, in employ of Netherlands Trading Society, 1868. Head manager Deli Company (tobacco plantations), 1871-1883. Returned to Amsterdam as head manager Deli Railway Company, 1883.
Member 2d Chamber States General (House of Representatives), 1884-1897. Minister for the colonies, 1897-1901. Again member 2d Chamber States General, 1901-1905.
President Netherlands Trading Society, at Amsterdam, 1906-1912. Member 1st Chamber States General (Senate), since 1912. Special envoy of Queen of Netherlands to Hudson-Fulton Celebration, New York, 1909.
Member of Parliament and Electrical Engineer from Netherlands to the United States, since 1918.