Deputy counsel, U.S. Senate Committee on Indian Affairs, 1993-1996
Counsel to the deputy attorney general, Office of Tribal Justice, U.S. Department of Justice, 1996-1998; special assistant U.S. attorney, District of Arizona, 1997-1998
Assistant U.S. attorney, District of Arizona, 1998-2007; senior litigation counsel, 2001-2007; U.S. Senate Committee on Indian Affairs (on detail), 2005-2006
Judge, Hopi Appellate Court, Keams Canyon, Arizona, 2002-2007
U.S. attorney for the District of Arizona, 2007-2009
Acting chief prosecutor, The Hopi Tribe, Keams Canyon, Arizona, 2009
Private practice, Phoenix, Arizona, 2009-2011
Professor of practice, Arizona State University College of Law, 2011-2014
Special advisor to the president and special counsel, Office of General Counsel, Arizona State University, 2011-2014
Former names: Diane Killigrew, Diane Joyce Juarez
Nominated to U.S. District Court for the District of Arizona, September 19, 2013; no Senate vote