Professor Aronson joined the UW law school faculty in 1975. Prior to coming to the UW, he was a Teaching Fellow at Stanford Law School, and taught Civil Procedure at the University of San Diego Law School while clerking for Judge James Carter of the Ninth Circuit Court of Appeals.
He earned his J.D. cum laude from the University of Pennsylvania, where he was an editor of the law review. He is a nationally recognized expert in professional responsibility and his book, The Law of Evidence in Washington, is one of the leading treatises on the subject. He has served as Chair of the The Association of American Law Schools (AALS) Section on Professional Responsibility, National Conference of Bar Examiners MPRE Drafting Committee, Commissioner on Uniform State Laws, Washington Legislative Ethics Board, AALS Committee on Bar Admission and Lawyer Performance, Law School Admission Council, Finance and Legal Affairs Committee, President of the Board of the Washington Appellate Defender Association, Reporter for the American Academy of Matrimonial Lawyers Standards of Conduct, and Hearing Tribunal Member for the Washington Human Rights Commission.
He was a member of the drafting committees for the Association of Trial Lawyers of America (ATLA) Code of Conduct, Uniform Rules of Evidence, Uniform Rules on Child Testimony, and Uniform Statutory Construction Act. He also serves on the Editorial Board of the International Journal of Criminal Law Education. He has been Chair of the UW Faculty Senate, and served as the University's Faculty Athletic Representative.
He was President of the Pac-10 Conference and Chair of its Compliance & Enforcement Committee. Students have thrice chosen him as Outstanding Professor of the Year.