1974-1977 – He was a general partner of Lehman Brothers.
1977 – He joined the Blackstone Group as vice-chairman, head of merger and acquisition advisory and a member of the investment committee.
1977-1981 – He served as the Assistant Secretary of the United States Treasury.
1987-1992 – He was the Vice-President of the Blackstone Group where he led that firm’s merger advisory business.
1993 – He returned to Washingto, D.C. to serve as the Deputy Secretary of the US Treasury.
1994 – He resigned because of a record keeping scandal on August 29, 1994.