Sunstein joined the Office of Legal Counsel in the Justice Department as an attorney-advisor (1980–1981) and then took a job as an assistant professor of law at the University of Chicago Law School (1981–1983), where he also became an assistant professor in the Department of Political Science (1983–1985). In 1985, Sunstein was made a full professor of both political science and law; in 1988, he was named the Karl N. Llewellyn Professor of Jurisprudence in the Law School and Department of Political Science. The university honored him in 1993 with its "distinguished service" accolade, permanently changing his title to Karl N. Llewellyn Distinguished Service Professor of Jurisprudence in the Law School and Department of Political Science. In 2009, Sunstein was described by fellow Chicago professor Douglas G. Baird as a "Chicago person through and through".