About Nathan
Nathan Leonardo built his legal foundation at the University of Arizona, where he completed a Bachelor of Arts in English and Anthropology in 1994 and earned his Juris Doctor in 1997. The combination of humanities and law shaped an approach that values clear writing and careful analysis. Those skills followed him into public service early in his career.
After law school, he moved into county work. In 1998 he joined the Pima County Attorney's Office as a deputy. The role put him in courtrooms frequently and gave him steady trial experience. He later entered federal service as an Assistant United States Attorney in 2002, handling federal prosecutions and learning the mechanics of complex case preparation.
In 2005 he shifted to private practice as a founding partner of Leonardo & Roach, LLC. Four years later he took on a leadership role as president of Leonardo Law Offices, PLLC, the firm he leads today. Those moves marked a transition from government litigation to running a law practice and representing individual clients in criminal matters.
Leonardo is a Certified Criminal Law Specialist through the State Bar of Arizona. That credential recognizes a concentrated practice in criminal law and a record of courtroom work in state matters. He is admitted to practice in Arizona and is authorized to appear before the Ninth Circuit. Those credentials allow him to handle matters in both state and federal systems.
Colleagues describe him as steady in court and meticulous in case preparation. He has handled investigations, trials, and the day-to-day motions work that often decides cases long before trial. His background in both county and federal offices gives him a familiarity with prosecutorial procedures on both tracks.
Outside the courtroom he has managed the business side of a practice, overseeing case intake, client counseling, and courtroom staffing. That administrative side has become part of his role as president of his firm.
He continues to practice at Leonardo Law Offices, PLLC, handling criminal defense matters in state and federal courts.
