1966, BA, University of Virginia; 1968, MBA, University of Pennsylvania. 1969-72, with US Air Force; 1972-96, with Alex Brown & Sons; 1996-2003, President and Vice-Chairman, NASDAQ Stock Market, US. Former Trustee: Johns Hopkins University; The Nature Conservancy; Baltimore Symphony Orchestra; Outward Bound of Maryland. Former Vice-Chair, President's National Infrastructure Advisory Council. Former Chairman, XBRL US. Vice-Chair, National Medal of Technology Evaluation Committee. Chairman, Princeton Capital Management. Former Director: ACI Worldwide; Webex Communications; Safeguard Scientifics; Cognos. Director: Realpage; Security First Corp; World Economic Forum USA.