U.S. Army sergeant, 1944-1946
Vocational advisor and psychometrist, Veterans Administration, San Juan, Puerto Rico, 1946-1947
Puerto Rico Labor Relations Board, 1948-1952; trial examiner, 1948; chief, Legal Division, 1949-1952
Chairman, Wage and Hour Commission under the Fair Labor Standards Act, U.S. Department of Labor, 1952-1958
University of Puerto Rico, 1952-1965; director, Labor Relations Institute, 1952-1955; dean of administration, 1955-1959; professor, labor relations and labor law, 1952-1965
Attorney general, Commonwealth of Puerto Rico, 1959-1962
Secretary of justice, Commonwealth of Puerto Rico, 1962-1965
Judge, U.S. District Court, District of Puerto Rico (appointed for a fixed term), 1965-1967