Ms. Mentzer clerked for the Honorable Allen Broussard of the California Supreme Court. After working as a legal services attorney with Evergreen Legal Services for five years representing farmworkers, she clerked for the Honorable William Baker of the Washington Court of Appeals, Division I.
Ms. Mentzer then joined the law firm of Schwerin Campbell Barnard, where she practiced labor and employment law and became a partner before returning to legal services with the Northwest Justice Project.
In 2001, Ms. Mentzer was appointed an administrative law judge with the Washington State Office of Administrative Hearings. She served there for almost 17 years, the last 10 of which she worked solely on education cases. In May 2018, Ms. Mentzer retired from OAH and worked as a volunteer attorney at the ACLU of Washington through the end of 2018. She joined Cedar Law PLLC in January 2019.