Judge Campbell has been a United States District Judge for the District of Arizona since 2003. He currently chairs the Committee on Rules of Practice and Procedure for the Federal Courts, which oversees the work of the five Advisory Committees on the Federal Rules of Civil, Criminal, Bankruptcy, and Appellate Procedure, and the Federal Rules of Evidence. He served as chair of the Advisory Committee on the Federal Rules of Civil Procedure from 2011 to 2015, and as a member of the committee from 2005 to 2011.
Judge Campbell is a member of the American Law Institute; a Fellow of the American Bar Foundation; has worked with the courts of Botswana, Namibia, and South Africa on judicial case management; and has taught civil procedure and constitutional law at the Arizona State and Brigham Young University Law Schools.
Following his graduation from the University of Utah Law School, he served as a law clerk for Justice William H. Rehnquist of the United States Supreme Court and Judge J. Clifford Wallace of the Ninth Circuit Court of Appeals. Judge Campbell worked as a commercial litigator for 20 years with the Phoenix law firm of Osborn Maledon before joining the bench.