Bachelor, University of Pennsylvania, 1972; Master of Arts, Yale University, 1976; Master of Philosophy, Yale University, 1978.
Curatorial assistant, Museum of Fine Arts, Boston, 1973-1974; teaching fellow, Yale University, New Haven, Connecticut, 1978-1979; trust officer, portfolio manager, State St. Bank & Trust, Company, Boston, 1980-1984; portfolio manager, Trinity Investment Management Corporation, Boston, 1984-1989; supervising portfolio manager, Trinity Investment Management Corporation, Cambridge, 1989-1992; managing director, Trinity Investment Management Corporation, Cambridge, since 1992.
Board of directors The Bostonian Society, since 1982, assistant treasurer, 1982-1985, treasurer, since 1985. Board directors Alliance Française of Boston, 1983-1988, treasurer, 1983-1988. Overseer Museum of Fine Arts, Boston, since 1988, assistant chair visiting city department Egyptian art, 1990-1993, chair, since 1993.
Member American Bankers Association (certified finance services counsellor 1983), Association for Investment Management and Research, Boston Security Analysts Society, The Brook Club (New York City), Somerset Club (Boston), The Country Club (Brookline, Massachusetts).
Son of John de Bragança and Winifred (Seyburn) Cheston. Married Barbara Fales, September 27, 1980. Children: Miguel Samuel, Annabel, Camilla.