Professor Singer, now emeritus, teaches courses on criminal law, including federal criminal law, advanced substantive criminal law and criminal procedure (adjudication). He served as dean of the law school from 1986 to 1989.
Prior to joining the law faculty in 1986, Professor Singer taught at the University of Alabama Law School, the University of Cincinnati Law School, and Benjamin Cardozo Law School, and Rutgers-Newark, where he was also served as associate dean.. He has taught as an adjunct or as a visitor, at Columbia, George Washington, U.Penn., and U. Puget Sound.
Professor Singer served as a special assistant in the United States Attorney Office in Newark, and directed the ABA Resource Center on Correctional Law and Legal Services. He was a Reporter on both the Model Sentencing and Corrections Act (National Conference of Commissioners on Uniform State Laws) and the ABA Standards Relating to the Legal Status of Prisoners.
Professor Singer was a visiting fellow in England at Cambridge University's Clare Hall, Institute of Criminology; and a fellow in the Teaching Excellence Center at Rutgers;. Professor Singer was on the brief for the (successful) petitioner in Apprendi v. New Jersey, 530 U.S. 466 (2000). He is a life member of the American Law Institute.