Law clerk to presiding justice United States District Court Delaware, 1957-1960. Associate Haley Woolenberg & Bader, Washington, 1960-1961. Staff attorney special study securities markets United States Securities and Exchange Commission, 1961-1963, attorney, 1963, chief attorney enforcement branch, 1963-1966, chief enforcement attorney, 1966, assistant director, 1967, associate director, 1968-1972, deputy director division trading and markets, 1972-1973, director division enforcement, 1973-1981.
General counsel Central Intelligence Agency, 1981-1986. Judge The United States of America District Court District of Columbia, 1985-2000. Partner Weil Gotshal & Menges, since 2000.
Adjunct professor Antioch Law School, 1974-1981, Howard University, since 1981. Member executive committee University California Securities Regulation Institute, since 1977.
Fellow American Bar Foundation. Member American Bar Association, Federal Bar Association (executive council securities law section since 1978), Delaware Bar Association, Bar Association of District of Columbia, American Law Institute, American Institute Certified Public Accountant's, Federal Legal Council, Administrative Conference of the United States, Phi Beta Kappa, Phi Kappa Phi.