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Andrew Mergen

Lecturer on Law

Spring 2023

Andrew Mergen
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Andrew Mergen is Deputy Chief of the Appellate Section of the Environment & Natural Resources Division of the U.S. Department of Justice. He has presented arguments in all thirteen federal courts of appeals and in several state Supreme Courts. He has also assisted in the briefing of numerous U.S. Supreme Court cases. In 2009, he was detailed to the White House Counsel’s Office to assist on the confirmation of the Honorable Sonia Sotomayor as Associate Justice of the Supreme Court.

Mr. Mergen has taught at American University, the Villanova University, the Catholic University of America, and most recently at the William S. Richardson School of Law at the University of Hawaii-Manoa. Mr. Mergen has written on federal water rights, A Misplaced Sensitivity: The Draft Opinions in Wyoming v. United States, 68 Colo. L. Rev. 683 (1997) (with Sylvia F. Liu); on energy development on public lands, Surface Tension: The Problem of Federal Private Split Estates, 33 Land & Water L. Rev. 419 (1998); and, more recently, on climate change and the Endangered Species Act, The Role of Climate Change in ESA Listing Decisions, 53 Rocky Mt. Min. L. Fdn. 67 (2016) (with Murray Feldman).

Mr. Mergen’s research interests include Environmental and Natural Resources Law, Administrative Law, and Environmental Legal History. He is a graduate of the University of Wisconsin-Madison and the George Washington University School of Law.