He has also taught tax courses at Yale Law School, St. John Fisher College, and the William E. Simon Graduate School of Business Administration at the University of Rochester. He presently provides consulting tax counsel for the firm of Boylan, Brown, Code, Vigdor & Wilson, L.L.P., in Rochester, New York. After law school, he worked for five years as a tax associate at Sullivan & Cromwell, LLP, in New York City. Professor Nassau received a B.A. in Japanese Studies from Yale in 1981 and his J.D. from Harvard in 1986.