Stephen Shay, Deputy Assistant Secretary for International Tax Affairs in the Treasury Department, has accepted a position as Professor of Practice at Harvard Law School. From the Harvard press release:

Since joining the Treasury Department in 2009, Shay has worked to develop and oversee implementation of U.S. international tax policy. … Previously a partner for 22 years at Ropes & Gray, LLP, Shay has extensive tax counseling and controversy experience advising multinational companies, private equity funds, financial institutions, global institutional investors and foreign governments on cross-border taxation matters and transfer pricing. … Prior to joining Ropes & Gray in 1987, Shay spent five years as International Tax Counsel at the Treasury Department. … Shay is a 1972 graduate of Wesleyan University, and he earned his J.D. and his M.B.A. from Columbia University in 1976.