Guy has practiced tax law for over 40 years. He has been a lecturer in tax law at Fontbonne University and Washington University in St. Louis, Missouri, and is the author of articles for the Journal of the Missouri Bar and St. Louis Bar Journal. He received his JD from Cornell Law School, where he was editor-in-chief of the Cornell International Law Journal; received his LLM in Taxation from New York University; and served as clerk to the U.S. Tax Court.