Mary Hollingsworth is a Senior Trial Attorney in the U.S. Department of Justice’s Environment and Natural Resources Division, Wildlife and Marine Resources Section. She has more than a decade of experience litigating cases arising under the Endangered Species Act in federal courts across the country. Ms. Hollingsworth has led DOJ’s efforts to enforce the civil components of federal animal welfare statutes, including in United States v. Lowe, United States v. Gingerich, and United States v. Envigo. In 2017, the Attorney General awarded Ms. Hollingsworth the John Marshall Award for Asset Forfeiture for her role in developing and implementing a strategy for pursing civil forfeiture actions to transfer ownership of dogs seized from those suspected of engaging in illegal dogfighting operations. 

Prior to joining DOJ as an Honors Attorney, Ms. Hollingsworth clerked for the Honorable Judge G. Murray Snow of the U.S. District Court for the District of Arizona and the Honorable Justice Michael Ryan of the Arizona Supreme Court. She received a B.A. in Political Science and Russian & East European Studies from the University of Michigan and a J.D. from the University of Arizona.