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Regina L Nassen

Principal Assistant City Attorney


Regina L. Nassen is a Principal Assistant City Attorney in the Tucson City Attorney’s Office, a position she recently assumed after almost 18 years in Pima County government.  At Pima County, she served as a Deputy Pima County Attorney in the Civil Division of the Pima County Attorney’s Office (“PCAO”) from October 2003 until she left in March of this year to serve a short stint as a Pima County Deputy Director of Economic Development before joining the City Attorney’s Office in August.While at PCAO Regina also served as the Supervising Attorney of the Civil Division’s Business & Transactions Unit beginning in 2004, and as PCAO’s Chief Ethics Counsel beginning in 2013. Prior to becoming a public lawyer, she was in private practice as an Associate in the Tucson office of Snell & Wilmer from 1993 to 2000.  Regina’s practice has, throughout her career, been a diverse one. Though primarily a real-estate, commercial-transactions, municipal-finance, and general-advice lawyer, she has also had a distinguished appellate career, with expertise in state-constitutional-law questions, and has successfully handled several significant cases in Superior Court. She has served on the Arizona Supreme Court’s Attorney Ethics Advisory Committee since its formation and is a fellow of the American Bar Foundation and a member of the publication committee of the American Bar Association’s Government & Public Sector Lawyers Division (“GPSLD”). Regina is a past Chair of the State Bar of Arizona’s Public Lawyers Section and previously served on the GPSLD’s Executive Council and the ABA’s Center for Professional Responsibility CLE Committee. She has presented or moderated numerous CLE presentations on ethics, real-estate practice, constitutional law, local-government law, and legal writing. She is a recipient of the SBA’s Public Lawyers Section Distinguished Public Lawyer Award.  Regina graduated summa cum laude from the University of Arizona College of Law in 1992, after which she clerked for Justice Frederick Martone on the Arizona Supreme Court before entering private practice. She graduated summa cum laude from the University of Northern Iowa in 1986, with a double major in Philosophy and Anthropology.