Justice Mansfield received his undergraduate degree from Harvard in 1978 and his law degree from Yale in 1982. After law school he clerked one year for the U.S. Court of Appeals, Fifth Circuit. Justice Mansfield then worked 26 years as an attorney in private practice until his appointment to the Iowa Court of Appeals in 2009. Two years later, Justice Mansfield joined the Iowa Supreme Court.
Justice Mansfield has been an adjunct professor of law at Drake University since 1997, teaching subjects ranging from contracts to antitrust and sports law. Justice Mansfield is a member of the Iowa State Bar Association, having served several terms as Chair of the Trade Regulation Section. Justice Mansfield currently chairs the task force on revision of the Iowa Rules of Criminal Procedure. He is also a member of the Polk County Bar Association and the Iowa Judges Association. Justice Mansfield has previously served as a Member and a Chairperson of the Board of Directors of Goodwill of Central Iowa. Justice Mansfield is married and has three children.
His current term expires December 31, 2028.