Mary S. Choi

Mary S. Choi brings decades of experience in criminal law, with a career spanning public defense, prosecution, and private practice. She has worked extensively in juvenile justice, trial courts, and appellate matters, giving her a well-rounded and deeply informed perspective on criminal cases.

Mary began her legal career after earning her Juris Doctor from Washington University School of Law and has served multiple terms as an Assistant Public Defender with the Missouri State Public Defender’s Office. In that role, she handled juvenile delinquency and certification hearings, appellate briefs, and post-conviction relief matters, while advising clients on appropriate legal strategies.

She has also served as an Assistant Prosecuting Attorney in both St. Charles County and Franklin County, preparing cases for trial, managing court dockets, and appearing on warrant duty. Her experience on both sides of the courtroom informs a strategic, practical approach to defense work.

More recently, Mary has continued practicing in roles involving court appearances, pleadings, and client advocacy, including traffic-related matters and municipal proceedings. Her long-standing commitment to the justice system and client representation makes her a valuable addition to the Rose Legal Services team.