Castillo, Ruben Born 1954 in Chicago, IL Federal Judicial Service: Judge, U.S. District Court, Northern District of Illinois Nominated by William J. Clinton on January 27, 1994, to a seat vacated by Nicholas John Bua. Confirmed by the Senate on May 6, 1994, and received commission on May 9, 1994. Served as chief judge, 2013-present. Education: Loyola University Chicago, B.A., 1976 Northwestern University School of Law, J.D., 1979 Professional Career: Private practice, Chicago, Illinois, 1979-1984, 1991-1994 Assistant U.S. attorney, Northern District of Illinois, 1984-1988 Regional counsel, Mexican American Legal Defense Fund, 1988-1991 Vice chair, U.S. Sentencing Commission, 1999-2010