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Eric Glitzenstein is a founding partner of the firm. He specializes in environmental, wildlife, animal protection, natural resource, open government, and other public interest cases. He has been lead or co-counsel in hundreds of cases in federal courts throughout the country, and has argued dozens of cases in the U.S. Courts of Appeals. In addition to serving as lead counsel in several cases in the U.S. Supreme Court, Eric has filed many amicus briefs in that Court on behalf of non-profit organizations in environmental, administrative law, open government, and constitutional cases.

On behalf of both national organizations and grassroots activists, Eric has prevailed in many significant cases under the Endangered Species Act ("ESA"), National Environmental Policy Act, and other federal environmental and animal protection statutes, including lawsuits resulting in: the protection of the Canada lynx and its habitat under the ESA; the creation of new sanctuaries and refuges for the Florida manatee; the listing of hundreds of animals and plants as endangered or threatened; a strengthened recovery plan for the grizzly bear; new safeguards for right whales in both the Atlantic and Pacific Oceans; limitations on limestone mining in the Everglades; new protections for endangered bats at risk from industrial wind power; curbs on off-road vehicle use in the Big Cypress National Preserve; the elimination of grizzly bear hunting in Montana; the halting of gray whale hunting off the coast of Washington; strengthened rules for valuing and restoring natural resources damaged by oil and other toxic spills; and the promulgation of stricter effluent standards under the Clean Water Act.

Eric has also successfully litigated many cases under the Freedom of Information Act ("FOIA"), Federal Advisory Committee Act ("FACA"), and other open government statutes, including cases holding that: federal prisoners are entitled to obtain access to their presentence reports under FOIA; expert panels of the National Academy of Sciences must comply with FACA; and the National Archives could not defer to President Nixon's claims of executive privilege in connection with public access to his Presidential papers.

For 12 years Eric was on the Board of Directors of Defenders of Wildlife, and served as the Chairman of that organization's Litigation Committee. He has been a Vice Chairman of the American Bar Association’s Committee on Animal Law, as well as the ABA’s Committee on Open Government and Right to Privacy.  In addition, he has served on the Board of Advisors of the Colorado-based Center for Native Ecosystems and is the President of the Wildlife Advocacy Project, another non-profit organization. Eric is a graduate of the Georgetown University Law Center (J.D. 1981, magna cum laude) and Johns Hopkins University (B.A. 1978). Before co-founding the firm, he clerked for Judge Thomas Flannery of the U.S. District Court for the District of Columbia and served as a staff attorney with the Public Citizen Litigation Group.

Eric has been invited to testify before Congressional committees on a variety of topics, including the proper implementation of the ESA, the licensing of nuclear power plants, access to presidential records, the functioning of the Federal Advisory Committee Act, and impacts of wind power projects on wildlife. He has also served as an Adjunct Professor of Law at Georgetown University Law Center, where he taught courses on public interest advocacy and civil litigation. He is frequently a guest lecturer at various law schools and a regular participant in conferences and panel discussions.

Some of Eric's publications include Endangered Species Act: Law Policy and Perspectives (chapter on Citizen Suits) (ABA Section of Environment, Energy and Resources) (2010) (edited by Donald C. Baur and Wm. Robert Irvin); The Yale Biographical Dictionary of American Law (entry on Alan B. Morrison) (Yale University Press) (2009); Public Participation in the Licensing of Nuclear Power Plants and Public Participation in the Oversight of Nuclear Power Plant Operations, published in Controlling The Atom in the 21st Century (1993; Westview Press); Project Modification: Illegitimate Circumvention of the EIS Requirement or Desirable Means to Reduce Adverse Environmental Impacts?, 10 Ecology L. Q. 253 (1982) (University of California, Berkeley); The Supreme Court's Decision in Morrison v. Olson: A Common-Sense Solution to a Practical Problem, 38 Am. U. L. Rev. 359 (1989) (with Alan Morrison); Annual Editions, Litigation Under the Federal Freedom of Information and Privacy Acts, American Civil Liberties Union (co-author of section on litigation strategy); and The Forest Service's Bait and Switch: A Case Study on Bear Baiting and the Service's Struggle to Adopt a Reasoned Policy on a Controversial Hunting Practice within the National Forests, 1 Animal L. 47 (1995) (with John Fritschie).