With Strasser, Spiegelberg, Fried & Frank, Washington and New York City, 1956-1958. Member campaign staff Harrison A. Williams for United States Senator, 1958. Legislation counsel Home Rule Committee, Inc., Washington, 1959-1960.
Counsel, associate director Foreign Policy Clearing House, 1960-1961. Assistant to secretary interior, 1961-1967. Partner Stroock & Stroock & Lavan, New York City, since 1967, in charge Washington office.
Official representative United States delegate General Agreement of Tariff and Trades Ministerial Meeting, Geneva, 1963. Member Governor's Commission on Historic Preservation, Maryland. Member District of Columbia Board Elections and Ethics.
Delegate Democratic National Convention, 1964, counsel credentials committee, 1968. Counsel compliance review committee Democratic National Committee. Visiting professor Irving B. Harris School Public Policy Studies University Chicago, since 1993.