Professor Donaldson teaches a number of courses in both the J.D. and LL.M. programs, including Basic Income Tax, International Taxation, Property Dispositions & Transactions, Partnership Taxation, and Estate Planning. He is the co-author of a two-volume treatise, International Taxation: Corporate and Individual (4th ed. Carolina Academic Press), and the sole author of the casebook, Federal Income Taxation of Individuals (West: American Casebook Series). Prior to joining the UW law school faculty in 1999, he was an attorney in Bellevue, WA, where his practice focused on federal taxation, estate planning, business acquisitions, and business succession planning. Professor Donaldson was the Harry R. Horrow Visiting Professor in International Law at Northwestern University School of Law in 2005. He has also served as a Visiting Assistant Professor at the University of Florida Levin College of Law. He is admitted to practice in Washington, Oregon, and Arizona. Professor Donaldson was recognized by the students as a Philip A. Trautman Professor of the Year in 2002, 2004, and 2006.