Bachelor of Arts, Princeton University, 1949. Postgraduate University of Virginia Law School,1950.
Chairman board, president Robert Garrett & Sons, Baltimore, 1951-1974. Partner Alex Brown & Sons., Baltimore, since 1974, member executive committee, since 1979, managing director, vice chairman board, 1987-1991, vice chairman, since 1993. Executive committee Duke University Investment Management Corporation, since 1982.
Trustee Chesapeake Bay Foundation, Annapolis, Maryland, Lawrenceville (New Jersey) School, chair finance committee, executive committee, Eaton Foundation, Mercy Hospital, Baltimore, Duke University, since 1993, member investment committee. Member finance committee Roman Catholic Archdiocese Maryland. Executive committee Duke University Investment Corporation.
With United States Navy, 1944-1946, PTO. Member The Brook Club, Green Spring Valley Hunt Club, Hamilton St. Club, Virginia Hot Springs Golf and Tennis Club, Ivy Club, Seminole Golf Club, Jupiter Island Club, Knights of St. Gregory, Knights of Malta.
Married Nellie Merrick, December 14, 1961. Children: Truman Thomas Junior, William Merrick.