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Mary Hollingsworth

Visiting Assistant Clinical Professor of Law

Faculty Director, Animal Law & Policy Clinic

Spring 2024

Mary Hollingsworth is the Director of the Animal Law & Policy Clinic and a Visiting Assistant Clinical Professor of Law. Prior to joining the Harvard Law School faculty, she served as a Senior Trial Attorney in the Wildlife & Marine Resources Section of the Environment & Natural Resources Division. For over a decade, she litigated cases arising under the Endangered Species Act in federal courts around the country. She also led the Justice Department’s efforts to enforce the civil components of federal animal welfare statutes, including in United States v. Lowe, United States v. Gingerich, United States v. Envigo, United States v. Keeler, and United States v. Mikirticheva. She also collaborated with the United States Marshals Service and others to create and implement a program to seize dogs from those suspected of engaging in illegal dogfighting operations. Those efforts have resulted in the rescue of over 3,000 dogs to date. During her career at the Justice Department, she received the John Marshall Award from the Attorney General twice for her animal welfare work.

Prior to joining the Justice Department as an Honors Attorney, she clerked for the Honorable Judge G. Murray Snow of the District of Arizona and the Honorable Justice Michael Ryan of the Arizona Supreme Court. She received her B.A. in Political Science and Russian & East European Studies from the University of Michigan and her J.D. from the University of Arizona, summa cum laude.