After earning an MBA from Harvard in 1967, he moved to New York and married his first wife, Fritzi Farber Kallop. Bill was an astute, inventive, and adventurous businessman. He first worked in real estate development, and then in mergers and acquisitions . In 1974 he structured a leveraged buyout of McAllister Brothers Towing & Transportation Inc., becoming part owner and CEO.
In 1998, Bill and his partner split McAllister, and he founded the Offshore International Group, focusing on exploration and production of oil and gas in the United States and Peru. The company operated 80 offshore platforms on more than 20 million acres of coastal Peru. In 2000 Bill married his second wife, Cristina Newall Kallop.
In 2009 he sold his companies and largely retired. During the last years of his life, he was happiest traveling and spending time on his boat with his family and friends.
Bill is survived by brothers George ’67 *69 and Peter ’73; his former wife, Fritzi, and their children, Brooks, Brent, and Field ’04; his second wife, Cristina, their children, Guillermo and Victoria; and eight grandchildren.