Professor Maranville joined the UW law school faculty in 1989 to help develop the clinical law program. She is now the director of clinical programs at the law school, directing the Workers' Rights Clinic and teaching the Access to Justice Seminar and two Legal Analysis Research and Writing Public Service capstones for 1Ls. She has also taught Feminist Legal Theory and Civil Procedure. While practicing poverty law from 1975-81 with legal services organizations in Seattle, Professor Maranville developed a specialty in public benefits cases and handled numerous class action lawsuits and individual administrative hearings and appeals. She then taught Civil Procedure, Administrative Law, and Trial Advocacy at the University of Puget Sound Law School.
Professor Maranville's publications reflect her interests in administrative law, public benefits law, especially unemployment compensation, feminist legal theory, and the integration of clinical teaching methodologies into the traditional law school curriculum. She is the author of Administrative Law, a book of simulation exercises to accompany the traditional Administrative Law course, and many law review articles. She has been a member of the Board of Editors of the Clinical Law Review and has chaired the Executive Committees of the American Association of Law Schools Poverty Law and Teaching Methods Sections. Locally, she has chaired the King County Bar Association's Gender Equality in the Legal Profession Committee and volunteered with the Northwest Women's Law Center.