Professor Hazelton manages the Marian Gould Gallagher Law Library and the Computing Services Department of the UW School of Law. In addition to her administrative duties, she teaches legal research, has taught Indian Law, and teaches in the UW Information School.
She serves as the Director of the Law Librarianship Program, a program leading to an M.L.I.S. for lawyers interested in careers in law librarianship. Professor Hazelton served as Associate Law Librarian, then Law Librarian and Associate Professor for five years at the University of Maine School of Law.
From 1981 until coming to the UW in 1985, she served as Assistant Librarian for Research Services and Acting Director at the Library of the U.S. Supreme Court. Professor Hazelton writes in the fields of law librarianship and legal research. In 1991 she was the President of the American Association of Law Libraries.
She has been the general editor of Specialized Legal Research (Aspen) since 2001 and wrote its chapter on banking law research that was last revised in 2005. She is a member of the Washington state bar and the U.S. Supreme Court bar.