David K Duncan

David K. Duncan is a retired United States Magistrate Judge. During his 17 years on the Phoenix bench, in light of that court's heavy civil case load, he presided by the parties' consent in more non-prisoner civil cases than many District Judges sitting in other cities across the country. In his last year as a judge, he had more hours on the bench in civil cases than any other federal judge in the District of Arizona. During his judicial career David served as chair of the Ninth Circuit's Magistrate Judges Executive Board, was a member of the Circuit's Information Technology Committee, and was a co-author (along with former UA law Dean Paul Marcus) of "The Rights of the Accused under the Sixth Amendment" (now in its third edition). Prior to joining the District Court in 2001, he was an Assistant United States Attorney. Before government service he was a partner in the Phoenix firms Osborn Maledon, P.A. and Meyer, Hendricks, Victor, Osborn & Maledon, P.C. He attended Brown University and the University of Arizona, and obtained his J.D., with high distinction, from the University of Arizona where he was a member of the Arizona Law Review. He served as a law clerk to the Hon. William D. Browning in Tucson.
After retiring, David co-founded Convergent ADR, LLC, a mediation and arbitration firm. Its members now include retired Arizona Court of Appeals Judge Peter Swann, Phoenix attorney Chris Berry, and Sally Schneider Duncan, who retired in 2022, after serving 18 years as a Maricopa County Superior Court Judge where she served on all calendars including two rotations on the downtown Phoenix civil docket.