Graduate, Royal French College, Berlin, 1932.
With, Berliner Handels-Gesellschaft, Berlin, 1932-1935; With, Lazard Brothers Ltd., London, England., 1936; With, Loeb, Rhoades & Company. New York City, 1937-1940; with, Arnhold and S. Bleichroeder, Inc., New York City, since 1940; president, Arnhold and S. Bleichroeder, Inc., 1955-1994; co-chairman, Arnhold and S. Bleichroeder, Inc., since 1994.
Trustee Station W National Educational Television/13, Carnegie Hall Society, Aldrich Museum Contemporary Art. Member trustees county National Gallery Art, Washington. Board directors American Council on Germany.
Member Investment Bankers Association American (Board of Governors 1969-1971, chairman foreign investment committee 1967-1972), Securities Industry Association (Board of Governors 1972-1973, chairman international finance committee 1972-1973), Bond Club, City Midday Club, Metropolitan Club.
Married Anna-Maria Arnhold, March 7, 1940. Children: Marina Kellen French, Michael.