Professor Hjorth joined the UW law school faculty in 1964, becoming a full professor in 1969. Since 1964, he has been a visiting professor at New York University, the University of Texas at Austin, the University of Michigan, and the University of Florida.
After college, Professor Hjorth spent one year at the University of Heidelberg on a Fulbright Fellowship and then attended New York University School of Law as a Root-Tilden Scholar.
After spending three years as an associate at Paul, Weiss, Rifkind in New York City, Professor Hjorth came to the UW. He was named Dean of the UW School of Law in 1995 and served in that capacity for six years. In 2001 he was designated the Garvey Schubert Barer Professor of Law.
He is the author of books on taxation of business enterprises and matrimonial tax, as well as numerous articles in legal publications and publications designed for continuing legal education programs.