Professor of law at Yale University (1962-1973, 1977-1981).
U.S. Solicitor General (1973-1977).
Judge for federal Circuit Court of Appeals for the District of Columbia (1982-1988).
He was nominated to the U.S. Supreme Court by President Ronald Reagan in 1987, but the nomination was rejected by the Senate on a 58-42 vote after extraordinarily contentious hearings.