Professor McIntyre has taught various tax courses at Wayne State University since 1975. He has written widely on a variety of tax topics, including the taxation of the family, the proper tax treatment of interest payments, the international aspects of taxation, and various topics on multistate taxation. Prior to coming to Wayne State, Professor McIntyre practiced with a tax firm in Washington, DC, and served for four years as the director of training at the International Tax Program of Harvard Law School. He was the founding editor-in-chief (1989-91) of Tax Notes International, a leading tax journal dealing with international tax issues around the world. He is a member of Wayne State's Academy of Scholars.
Over the past three decades, Professor McIntyre has consulted widely on a range of tax policy issues for various public bodies. In the international arena, Professor McIntyre has served as a consultant to national governments on six continents (including Australia, Bangladesh, Brazil, Canada, Egypt, New Zealand, Peru, Romania, Spain, United States and Vietnam), to the United Nations Department of Economic and Social Affairs, and to the Organization for Economic Cooperation and Development (OECD). He served for many years as a consultant to the United Nation's Committee of Experts on International Cooperation in Tax Matters, a group that prepared and has updated the UN’s model tax treaty.
In the domestic arena, Professor McIntyre was a consultant to the New York Legislative Tax Study Commission (1984-87) and is the author of the commission's report on low-income relief and the taxation of the family. The recommendations made in that report were enacted into law in 1987 as the centerpiece of a major tax reform. He has also consulted with Louisiana, Illinois, California, Alaska, and Kansas, and has worked on a variety of projects for the Multistate Tax Commission. He consulted with the Navajo Tribe and is the principal draftsman of the Navajo Business Activity Tax. He participates regularly on interdisciplinary projects with economists and served as chair of the Federal Taxation and Finance Committee of the National Tax Association (1994-96).
In addition to teaching at the Harvard International Tax Program (1971-75), Professor McIntyre has taught at the Harvard Business School (1973), the University of Virginia School of Law (1976-77), the University of Michigan Law School (1995) and Utrecht University (2005). In 1982-83, he was the inaugural holder of a Wayne State University Career Development Chair, and in 1990 he received the Board of Governors' Faculty Recognition Award for his book, The International Income Tax Rules of the United States. The second edition of his book (with B.J. Arnold), International Tax Primer, was published by Kluwer in 2003.