He started his career as private secretary to the president of the
World Bank,
Eugene "Gene" Robert Black, Sr. (1898-1992). He then was vice president and assistant to the chairman of the
Chase Manhattan Bank,
David Rockefeller, from 1963 to 1981. In 1985, he became United States Deputy Permanent Representative to the Economic and Social Council of the
United Nations. He was then appointed by President
George H. W. Bush to serve as the
Chief of Protocol of the United States from 1989 to 1991. He returned to the UN, serving as Under-Secretary-General of the United Nations and Special Representative for Public Affairs from 1992 to 1997. From 1997 to 2004, he served as President of the Staff-Management Coordination Committee of the UN. In January 2005, he was appointed as Under-Secretary-General and Special Adviser. He was re-appointed as such in 2009. He was a member of the
Council on Foreign Relations. He was the recipient of the
Legion of Honour. He also received The Yale Medal from his alma mater, Yale University. ==Personal life==