Attorney organized crime section, criminal division United States Department Justice, 1959-1963, assistant United States attorney (southern district) New York New York City, 1963-1968, chief appellate attorney, 1965-1966, assistant chief criminal division, 1966-1968. Associate professor law Fordham University Law School, 1968-1972. Partner Curtis, Mallet-Prevost, 1972-1981.
Judge United States District Court (southern district) New York, 1981—2000, senior judge, 2000—2008. Consultant National Committee for Reform of Criminal Laws, New York City, 1971-1972. Member Knapp Commission, 1971-1972.
Associate attorney Committee of Court on Judiciary, New York City, 1971-1972.