Prior to coming to Georgetown, he was law clerk to Justice Stephen G. Breyer of the U.S. Supreme Court and to Judge Guido Calabresi of the Second Circuit Court of Appeals. During 1998-99, Professor Katyal served as National Security Adviser to the Deputy Attorney General, U.S. Department of Justice. He was commissioned by President Clinton in 1999 to co-author a report on ways the legal profession can enhance its pro bono activities and diversify the Bar, served as co-counsel to Vice President Al Gore in the United States Supreme Court case of Bush v. Palm Beach Canvassing Board in 2000, and was Visiting Professor at Yale Law School in 2001-02. His publications have appeared in Yale Law Journal, Harvard Law Review, University of Chicago Law Review, Stanford Law Review, Michigan Law Review, and Pennsylvania Law Review. His primary academic interests are Constitutional Law (primarily separation of powers, constitutional legitimacy, presidential power, slavery and affirmative action), Criminal Law (particularly cybercrime, conspiracy, architectural solutions to crime and the role of deterrence), and Education Law.