Editor in Chief, University of Puerto Rico Law Review, 1980-1981. Law Clerk to Chief Justice José Trías Monge, Supreme Court of Puerto Rico, 1981-1982. Law Clerk to Judge Stephen Breyer, U.S. Court of Appeals, First Circuit, 1983-1984; Assistant Professor, University of Puerto Rico School of Law, 1984-1985; Adjunct Professor and Lecturer, University of Puerto Rico School of Law, 1985-1988. Director, Federal Litigation Division, Department of Justice, Commonwealth of Puerto Rico, 1985-1986; Special Assistant to the Governor in Charge of Federal Affairs, 1986-1989; Solicitor General, Commonwealth of Puerto Rico. 1989-1991; Attorney General, Commonwealth of Puerto Rico, 1991-1992.