Colloton is a federal judge from Iowa who has served on the US Court of Appeals for the Eighth Circuit since 2003. He is the son of John W. Colloton who is best known for his service as Director and CEO for the University of Iowa Hospitals and Clinics from 1971 to 1993. Also among the prestigious family members is sister Ann Colloton who is an all-American swimmer from the University of Michigan swim team from 1987 to 1990.
Colloton graduated from West High School before going on to earn his A.B. from Princeton University in 1985 and his law degree in 1988 from Yale Law School, where he served as editor of the Yale Law Journal. He clerked for Judge Laurence H. Silberman of the United States Court of Appeals for the District of Columbia Circuit from 1988 to 1989. Colloton then was a law clerk for United States Chief Justice William H. Rehnquist from 1989 to 1990.
Colloton then served as a special assistant to the attorney general in the Office of Legal Counsel within the U.S. Justice Department until 1991. He then served 8 years as an assistant U.S. Attorney in the Northern District of Iowa until 1999. For one year (1995-1996) he was an associate independent counsel in the office of Independent Counsel Kenneth Starr. From 1999 to 2001 he worked in a private practice in Iowa and served as an adjunct lecturer at the University of Iowa College of Law in 2000. In the same year, after Bush’s election, Colloton was appointed U.S. Attorney for the Southern District of Iowa and served until 2003.
Judge Colloton was nominated to the Eighth Circuit by President George W. Bush in February 2013 to a seat vacated by David R. Hansen. He was confirmed nearly seven months later by an astonishing 94 to 1 vote by the Senate in September 2003 and received his seat on the bench in the same month.