Previously, he worked as an Attorney-Adviser to Judge Joseph H. Gale of the United States Tax Court and as an associate at Dewey & LeBoeuf LLP, where his practice included tax controversy matters and the taxation of financial products. Professor Green's publications include “Captives: Creeping State Tax Reach,” Captive Insurance Company Reports (October 2010) and “Prepay It Forward: Horizontal Equity and the Taxation of ETNs,” 26 Journal of Taxation of Investments 22 (Spring 2009).