Bachelor, Harvard University, 1949. Master of Business Administration, Stanford University, 1951.
Security analyst, Bank of New York, 1951-1952; partner, Brundage, Story & Rose, New York City, 1961-1966; president, Wentworth, Dahl & Belden, San Francisco, 1966-1975; president, Belden and Associations Investment Counsel, San Francisco, since 1975. Regent Finance Analysts Seminar, 1976-1980.
Community adviser San Francisco Junior League, since 1977. President International Institute San Francisco, 1970. Served with Army of the United States, 1944-1946.
Member Investment Counsel Association American (governor 1976-1990), World Affairs Council Northern California (board directors since 1985, assistant treasurer 1991-1992, treasurer since 1992) Clubs: University (New York City), Harvard (New York City). Bankers, St. Francis Yacht (San Francisco).
Son of Louis de Keyser and Frances (Pardue) B.