Carr Ferguson holds legal degrees from Cornell University and New York University. He served as a professor at Iowa from 1960 to 1962.
After leaving Iowa, he taught at several law schools, including New York University, Stanford University, and University of San Diego. He also served as Assistant Attorney General in charge of the Tax Division for the U.S. Department of Justice, and spent many years in private practice as a tax lawyer. In 2008, the ABA's Section on Taxation awarded Professor Ferguson its Distinguished Service Award.