Partner, Bracewell LLP
Jeffrey Holmstead, former assistant administrator of the United States Environmental Protection Agency for Air and Radiation, is one of the nation’s leading climate change lawyers as recognized by Chambers USA (2008-2016) and heads the environmental strategies group (ESG) at Bracewell. The ESG is a multi-disciplinary group that includes environmental and energy attorneys, public policy advocates and strategic communications experts – most of whom have had high-level government experience. Under Jeffrey’s leadership, they work together on a daily basis to advise and defend companies and business groups confronting major environmental and energy-development challenges, both domestically and globally.
From his time in both the government and the private sector, Jeffrey is very familiar with the environmental and energy challenges facing the business community. He advises clients dealing with an increasingly complex regulatory, legal and public relations landscape, drawing on his experience in policy development, administrative and legislative advocacy, litigation and strategic communications. He has worked with clients in a number of industries on issues related to climate change, Clean Air Act policy and enforcement, and energy policy — including the development of new coal-fired power plants, refineries, renewable energy sources, and electric transmission infrastructure.
Jeffrey headed the EPA’s Office of Air and Radiation from 2001 to 2005, longer than anyone in EPA history. During his tenure, he was the architect of several of the agency’s most important initiatives, including the Clean Air Interstate Rule, the Clean Air Diesel Rule, the Mercury Rule for power plants and the reform of the New Source Review program. He also oversaw the development of the Bush Administration’s Clear Skies Legislation and key parts of its Global Climate Change Initiative. Between 1989 and 1993, Jeffrey served on the White House Staff as Associate Counsel to former President George H.W. Bush. In that capacity, he was involved in the passage of the Clean Air Act Amendments of 1990 and the key steps taken to implement those amendments. From 1987 to 1988, he served as a law clerk to Judge Douglas H. Ginsburg on the U.S. Court of Appeals for the District of Columbia.
He received his B.A. from Brigham Young University, summa cum laude, and his J.D. from Yale Law School.
Tazewell Taylor Professor of Law and William H. Cabell Research Professor, William & Mary Law School
Jonathan H. Adler joined the William & Mary law faculty as the Tazwell Taylor Professor of Law and William H. Cabell Research Professor in 2025. Prior to joining the faculty, he was the inaugural Johan Verheij Memorial Professor of Law and the founding Director of the Coleman P. Burke Center for Environmental Law at the Case Western Reserve University School of Law.
Professor Adler is the author or editor of seven books, including Climate Liberalism: Perspectives on Liberty, Property and Pollution (Palgrave, 2023), Marijuana Federalism: Uncle Sam and Mary Jane (Brookings Institution Press, 2020), Business and the Roberts Court (Oxford University Press, 2016) and Rebuilding the Ark: New Perspectives on Endangered Species Act Reform (AEI Press, 2011).
His articles have appeared in publications ranging from the Harvard Environmental Law Review and Yale Journal on Regulation to the Wall Street Journal, New York Times, and Washington Post. He has testified before Congress a dozen times, and his work has been cited in the U.S. Supreme Court. A 2024 study identified Professor Adler as the seventh most cited legal academic in administrative and environmental law from 2019 to 2023.
Professor Adler is a contributing editor to Civitas Outlook and a regular contributor to the popular legal blog, The Volokh Conspiracy. A regular commentator on constitutional and regulatory issues, he has appeared on numerous radio and television programs, ranging from the PBS Newshour and National Public Radio to the Fox News Channel and Entertainment Tonight.
Professor Adler is a senior fellow at the Property & Environment Research Center in Bozeman, Montana. In 2018, Professor Adler was elected to membership in the American Law Institute and helped co-found the organization Checks and Balances. In 2024, Professor Adler was appointed a public member of the Administrative Conference of the United States.
Professor Adler clerked for the Honorable David B. Sentelle on the U.S. Court of Appeals for the District of Columbia Circuit.
Senior Research Fellow and Director of the Project for the Study of American Capitalism, Mercatus Center at George Mason University
Matthew D. Mitchell is a Senior Research Fellow and Director of the Project for the Study of American Capitalism at the Mercatus Center at George Mason University. He is also an adjunct professor of economics at Mason. In his writing and research, he specializes in public choice economics and the economics of government favoritism toward particular businesses, industries, and occupations.
Mitchell has testified before the US Congress and has advised several state and local government policymakers on both fiscal and regulatory policy. His research has been featured in numerous national media outlets, including the New York Times, the Wall Street Journal, the Washington Post, US News and World Report, National Public Radio, and C-SPAN. He blogs about economics and economic policy at Neighborhood Effects and at Concentrated Benefits.
Mitchell received his PhD and MA in economics from George Mason University and his BA in political science and BS in economics from Arizona State University.
Founding Partner, Boyden Gray & Associates
Ambassador C. Boyden Gray is the founding partner of Boyden Gray & Associates, a law and strategy firm in Washington, D.C., focused on constitutional and regulatory issues.
Mr. Gray worked in the White House for twelve years, first as counsel to the Vice President during the Reagan administration and then as White House Counsel to President George H.W. Bush. In the Reagan administration, he was Counsel to the Presidential Task Force on Regulatory Relief, for which he wrote the original Executive Order 12291 requiring cost-benefit analysis and White House review of regulations (later renumbered as current EO 12866). In the George H.W. Bush Administration, Mr. Gray was in charge of judicial selection and was also instrumental in the enactment of the Clean Air Act Amendments of 1990, the Energy Policy Act of 1992, and a cap-and-trade system for acid rain emissions. In 1993, he received the Presidential Citizens Medal. Under President George W. Bush, Mr. Gray was U.S. Ambassador to the European Union and U.S. Special Envoy to Europe for Eurasian Energy.
Mr. Gray practiced law for 25 years at the law firm of Wilmer, Cutler & Pickering and was chairman of the Administrative Law and Regulatory Practice Section of the American Bar Association from 2000 to 2002. Early in his career, Mr. Gray helped to develop the Business Roundtable and served as its first counsel. He is an adjunct professor at Antonin Scalia Law School and a former adjunct professor at NYU Law School (teaching energy and environmental law). Mr. Gray is on the Board of Directors of the Atlantic Council, the Federalist Society, Reason Foundation, and the Trust for the National Mall.
Mr. Gray earned his A.B. magna cum laude from Harvard, where he was an editor of the Crimson, and his J.D. with high honors from the University of North Carolina at Chapel Hill, where he was editor-in-chief of the Law Review. Mr. Gray served in the United States Marine Corps, and after law school, he clerked for Earl Warren, Chief Justice of the United States Supreme Court.
Partner, Mayer Brown LLP
An experienced appellate lawyer, Tim Bishop has argued five cases and briefed more than 60 before the US Supreme Court and has successfully handled dozens of appeals in federal and state appellate courts. He also represents clients in dispositive dismissal, summary judgment, and class certification motions in federal and state trial courts. Tim is co-author of the leading treatise, Supreme Court Practice(9th ed., 2007), a contributor to Federal Appellate Practice (2008), and a prolific author and speaker in the areas of appellate practice, environmental law, and securities law.
Tim has substantial experience in environmental and land use litigation (especially under the Clean Water Act, Endangered Species Act, Clean Air Act, federal and state Takings Clauses, and nuisance law), securities and antitrust litigation, class certification, federal and state tax controversies, labor and employment law, and constitutional appeals and litigation. In the securities area, he has submitted successful party or amicus briefs in most of the Supreme Court’s recent cases, including Dabit, Dura, Tellabs, Billing, Stoneridge, andAmchem, as well as in leading lower-court cases such as In re IPO Securities Litigation and Newton. He has broad experience in defeating class certification in complex litigation.
In the environmental law area Tim has been ranked as a top practitioner by Chambers, Best Lawyers in America, Euromoney's Best of the Best USA, and other publications, which have called him "the go-to guy if you have a serious environmental issue on appeal - he is excellent at spotting issues and is a great appellate advocate" (Chambers 2009). Tim is ranked Band 1 in Chambers USA 2012 in Environmental Law ("sources unanimously consider Bishop to be an exceptionally strong appellate lawyer") and Legal 500 2012 comments, "Bishop is 'superb and provides exemplary service.'" Tim successfully argued Solid Waste Agency of Northern Cook County in the Supreme Court, in which the Court struck down the Corps of Engineer’s "migratory bird rule." One leading environmental law professor and practitioner has written that Tim is "industry’s leading Supreme Court lawyer in environmental cases."
Since 1995, Tim has been a partner in Mayer Brown LLP’s 60-strong Supreme Court and Appellate Litigation Practice (which "stands head and shoulders above its competitors," according to Chambers USA 2008). Previously, he served as Law Clerk to US Supreme Court Justice William J. Brennan, Jr., and to Judge James L. Oakes, US Court of Appeals for the Second Circuit, and was Staff Counsel and Skadden Fellow with the American Civil Liberties Union. Recently, Tim was named one of Benchmark’s 2013 Appellate Illinois Litigation Stars.Chambers USA (2007) notes Tim’s “high visibility” and “incredible reputation for appellate law,” and he has been described in theLawdragon 500 as "a high court superstar" and a "top advocate" (2006).
Professor of Law, University of California Hastings College of the Law in San Francisco
Professor Dave Owen teaches courses in environmental, natural resources, water, land use, and administrative law. His interest in the subject area began when he was about six years old and his parents denied him access to all television except for PBS wildlife specials. He then became inordinately interested in poachers. He went on to study geology in college, primarily because the labs were outside, and became an environmental consultant. During one hot summer day of hazardous waste site sampling, while sweating miserably in a Tyvek suit and inhaling aniline fumes, he decided graduate school sounded like a nice idea. So he became an environmental lawyer. He went to Berkeley Law, where he served as editor-in-chief of Ecology Law Quarterly and was selected for the Order of the Coif.
Professor Owen went on to clerk at federal district court and then work for a small law firm in San Francisco, where his practice focused primarily on water law. He worked on Colorado River allocation, Sacramento-San Joaquin Delta litigation, and federal state disputes over the proposed Yucca Mountain nuclear waste repository, among other matters. In 2007, he began teaching at the University of Maine School of Law. He joined the Hastings faculty in 2015.
His research focuses primarily on water resource management, and some recent projects have addressed taxation of water consumption, the roles of federal regional offices, stream protection under the Clean Water Act, policies to expedite dam removals and hydropower upgrades, and the intersection of groundwater use regulation and the takings clause. Four of his articles have been recognized by his peers as among the top environmental law articles of their respective years; another article has won the Morrison Prize as the top sustainability law article of its year, and he has presented three articles at the Harvard Stanford-Yale Junior Faculty Forum. He also contributes frequently to the Environmental Law Prof Blog.
Director, Climate & Clean Air Program, Natural Resources Defense Council
David Doniger has been at the forefront of the battle against air pollution and global climate change since he joined NRDC in 1978. He helped formulate the Montreal Protocol, an international agreement designed to stop the depletion of the earth's ozone layer, as well as several essential amendments to the Clean Air Act. In 1993, he left NRDC to serve on the White House Council on Environmental Quality, followed by key posts at the U.S. Environmental Protection Agency. He rejoined NRDC in 2001 and has since been working to defend the Clean Air Act from assaults in Congress. He is based in Washington, D.C.
Partner, Crowell & Moring
Mr. Lorenzen is a partner in Crowell & Moring's Washington, D.C. office and is a member of the Environment & Natural Resources and Government Affairs groups. He works with clients seeking to successfully navigate the federal environmental rulemaking process.
With a decade of Justice Department experience managing the legal defense of all EPA rules, Mr. Lorenzen has a unique ability to help clients shape environmental policy, provide vital input on proposed federal environmental regulations through written comment and direct interaction with regulators, and mount effective judicial challenges to EPA actions that adversely affect his clients' interests. He also helps clients ensure compliance with existing environmental regulations. In addition, he is a noted appellate lawyer who has briefed, argued, or supervised hundreds of petitions for review of EPA regulations and other final EPA actions.
While he was at the Department of Justice, Mr. Lorenzen oversaw many of the seminal environmental cases of the last decade. These include Massachusetts v. EPA, in which the Supreme Court affirmed EPA's authority to regulate greenhouse gases under the Clean Air Act, and Entergy v. Riverkeeper, in which the Court held that EPA has discretion under the Clean Water Act to consider or decline to consider costs in determining how to regulate cooling water intake structures. In the D.C. Circuit and the other federal courts of appeals, he oversaw the government's defense in Coalition for Responsible Regulation v. EPA, in which the court upheld EPA's first suite of greenhouse gas regulations (largely upheld by the Supreme Court in Utility Air Regulatory Group v. EPA); EME Homer City Generation, L.P. v. EPA and North Carolina v. EPA, in which the court reviewed EPA's various attempts to address interstate transport of air pollutants; numerous cases challenging EPA regulations governing emissions of hazardous air pollutants; and National Cotton Council v. EPA, in which the Sixth Circuit reviewed EPA's Clean Water Act regulations governing the application of pesticides over waters of the United States.
Mr. Lorenzen is a frequent lecturer and commentator in print, on the internet, and on television regarding federal environmental law, climate change regulation, administrative law, federal policymaking, and effective appellate brief-writing and argument.
Senior Attorney, Pacific Legal Foundation
Damien Schiff is a senior attorney at Pacific Legal Foundation. He leads its environmental practice group, a unique initiative that draws broadly from PLF’s expertise and success in property rights and separation of powers litigation. Over the years, Damien has represented hundreds of landowners and property rights advocates to defend their liberties against heavy-handed and unwarranted environmental and land-use regulation. His litigation experience includes Sackett v. U.S. Environmental Protection Agency, a groundbreaking decision in which the U.S. Supreme Court upheld the right of landowners to challenge Clean Water Act compliance orders issued by EPA, and Contoski v. Norton, PLF’s successful effort to force the federal government to make good on its promise to delist the bald eagle from the Endangered Species Act.
Besides litigation, Damien has written academic articles on a variety of subjects, including the Endangered Species Act, the Clean Water Act, greenhouse gas torts, the duty to rescue, and international water law. He has appeared on a variety of television and radio programs and has been quoted in The New York Times, The Wall Street Journal, Harper’s Magazine, and The Economist, among other publications.
He obtained his law degree magna cum laude from the University of San Diego School of Law, and his undergraduate degree magna cum laude from Georgetown University. While at USD, he was a research assistant for Professor Bernard Siegan, a leading constitutional theorist and advocate for property rights and economic liberty. Immediately prior to joining PLF, Damien clerked for Judge (and former PLF attorney) Victor Wolski of the United States Court of Federal Claims. Damien credits the mentoring and examples of Professor Siegan and Judge Wolski for his decision to pursue a career in liberty-based public interest litigation.
Damien lives in Sacramento with his wife, two young sons, four chickens, and a cat named Princess. In his off hours he enjoys stamp collecting, Gregorian chant, and martinis—preferably at the same time.
Andrew Varcoe was formerly a partner at Boyden Gray & Associates in Washington, D.C. From 2014 to 2017, Mr. Varcoe was Deputy General Counsel at the Biotechnology Innovation Organization (BIO), the trade association for the biotechnology industry. He previously served as an attorney in the Office of the General Counsel of the U.S. Department of Agriculture (USDA) in Washington, D.C., and Harrisburg, Pennsylvania. While at USDA, he briefed, argued, and mediated cases in the federal courts of appeals and helped manage USDA’s and its agencies’ nationwide appellate litigation docket, working closely with trial and appellate lawyers at the U.S. Department of Justice. Before joining USDA, Mr. Varcoe was an associate and then counsel at Wilmer Cutler Pickering Hale and Dorr LLP (previously Wilmer, Cutler & Pickering). Mr. Varcoe served as a law clerk to Justice Francis X. Spina of the Massachusetts Supreme Judicial Court (from 1999 to 2000), and to Judge Edith H. Jones of the U.S. Court of Appeals for the Fifth Circuit (from 2001 to 2002).
Mr. Varcoe received his J.D. cum laude in 1999 from Harvard Law School, where he was a research assistant to Professor Martha Minow and an editor of the Harvard Journal of Law & Public Policy. Mr. Varcoe graduated with honors in 1995 from the University of Chicago, where he was Student Ombudsperson (a mediator, reporting to the President of the University, who investigated and resolved student grievances) and a member of Phi Beta Kappa.
In 2018 and 2019, Mr. Varcoe served as Chairman of the Executive Committee of the Federalist Society’s Environmental Law and Property Rights Practice Group.
Distinguished Professor of Law, Widener University Delaware Law School
James R. May is Distinguished Professor of Law, and Chief Sustainability Officer, Widener University (USA). He also serves as co-Director of the Environmental Rights Institute and co-Director of the Dignity Rights Project at Widener University Delaware Law School. May is also an Adjunct Professor of Graduate Engineering, and founded and co-chairs a program on marine policy. May is the editor of Principles of Constitutional Environmental Law (American Bar Association), and co-editor of Shale Gas and the Future of Energy (Edward Elgar), Global Environmental Constitutionalism (Cambridge), Environmental Constitutionalism in Context (Edward Elgar), New Frontiers in Environmental Constitutionalism (United National Environment Programme, forthcoming), Implementing Environmental Constitutionalism(Cambridge, forthcoming), Standards of Environmental Constitutionalism (Cambridge, forthcoming), and Human Rights and the Environment: Indivisibility, Dignity and Legality (Edward Elgar, forthcoming). May is also author or co-author of more than 100 articles and book chapters, and numerous amicus briefs to the U.S. Supreme Court and U.S. federal courts of appeal on issues including environmental law, constitutional law, comparative constitutional, international environmental law, environmental rights, and human dignity.
May founded two non-profit environmental organizations (the Mid-Atlantic and the Eastern Environmental Law Centers), and has litigated more than 200 public interest environmental claims, including cases throughout the Mid-Atlantic to restore water and air quality, conserve rare species and habitats, and protect biodiversity.
May is a Member of Faculty to the National Judicial College, and a Fellow of the American College of Environmental Lawyers, for whom he has served as a delegate to Haiti and China. May has also served as a consultant to the U.S. Embassy on legal education in the Philippines, and to the Hungarian Embassy and the Moroccan Human Rights Council on constitutional reform. May is a member of Phi Kappa Phi, serves on numerous boards, and has won numerous awards, including from Pace University, Sierra Club, and the American Canoe Association. He earned his B.S. in Mechanical Engineering from the University of Kansas (Bowman Scholar), J.D. from the University of Kansas (Appellate Advocacy Scholar and national moot court champion), and LL.M. in Environmental Law from Pace University, where he was the Feldshuh Fellow and graduated first in class.
May is a member of the bar in the State of Pennsylvania, several federal courts of appeal, and the U.S. Supreme Court.
Tazewell Taylor Professor of Law and William H. Cabell Research Professor, William & Mary Law School
Jonathan H. Adler joined the William & Mary law faculty as the Tazwell Taylor Professor of Law and William H. Cabell Research Professor in 2025. Prior to joining the faculty, he was the inaugural Johan Verheij Memorial Professor of Law and the founding Director of the Coleman P. Burke Center for Environmental Law at the Case Western Reserve University School of Law.
Professor Adler is the author or editor of seven books, including Climate Liberalism: Perspectives on Liberty, Property and Pollution (Palgrave, 2023), Marijuana Federalism: Uncle Sam and Mary Jane (Brookings Institution Press, 2020), Business and the Roberts Court (Oxford University Press, 2016) and Rebuilding the Ark: New Perspectives on Endangered Species Act Reform (AEI Press, 2011).
His articles have appeared in publications ranging from the Harvard Environmental Law Review and Yale Journal on Regulation to the Wall Street Journal, New York Times, and Washington Post. He has testified before Congress a dozen times, and his work has been cited in the U.S. Supreme Court. A 2024 study identified Professor Adler as the seventh most cited legal academic in administrative and environmental law from 2019 to 2023.
Professor Adler is a contributing editor to Civitas Outlook and a regular contributor to the popular legal blog, The Volokh Conspiracy. A regular commentator on constitutional and regulatory issues, he has appeared on numerous radio and television programs, ranging from the PBS Newshour and National Public Radio to the Fox News Channel and Entertainment Tonight.
Professor Adler is a senior fellow at the Property & Environment Research Center in Bozeman, Montana. In 2018, Professor Adler was elected to membership in the American Law Institute and helped co-found the organization Checks and Balances. In 2024, Professor Adler was appointed a public member of the Administrative Conference of the United States.
Professor Adler clerked for the Honorable David B. Sentelle on the U.S. Court of Appeals for the District of Columbia Circuit.
Professor of Law and Executive Director, Law and Economics Center, Antonin Scalia Law School, George Mason University
Donald Kochan is Professor of Law and Executive Director of the Law & Economics Center (LEC). Professor Kochan is an elected member of the American Law Institute (ALI) and serves as an Adviser to ALI's Restatement of the Law Fourth, Property project. Professor Kochan is a Nonresident Scholar at the Center for the Constitution at Georgetown University Law Center, where he was a Visiting Scholar in residence during Fall 2018. Before joining the Antonin Scalia Law School faculty, he was the Parker S. Kennedy Professor in Law at Chapman University’s Dale E. Fowler School of Law from 2004 to 2020. From 2003 to 2004, Professor Kochan was an Olin Fellow at the University of Virginia School of Law. During 2002-2003, he was a Visiting Assistant Professor of Law at George Mason’s Scalia Law School.
Professor Kochan’s scholarship focuses on areas of property law, constitutional law, administrative law, local government law, natural resources and environmental law, and law & economics. He has published several books and more than 50 scholarly articles and essays in well-regarded law journals. His work has been cited in more than a dozen state and federal court opinions, in more than 75 briefs filed in state and federal courts including more than 25 filed in the U.S. Supreme Court, in dozens of books and treatises, and in more than 800 scholarly articles.
Professor Kochan received his JD from Cornell Law School, where he was a John M. Olin Scholar in Law and Economics and managing editor of the Cornell International Law Journal. During law school, he also served as editor and executive editor of the Harvard Journal of Law & Public Policy symposium issues in 1997 and 1998. He received his BA from Western Michigan University, magna cum laude, with majors in both political science and philosophy, where he studied as the John W. Gill Medallion Scholar and was honored as the Presidential Scholar (awarded to the top graduate in the political science department).
After graduating from law school, Professor Kochan was a law clerk to The Honorable Richard F. Suhrheinrich of the United States Court of Appeals for the Sixth Circuit. Following his clerkship, Professor Kochan was an associate with the firm of Crowell & Moring LLP in Washington, D.C., where he specialized in natural resources & environmental law as well as tort, products, and consumer civil litigation & legislative affairs.
Robert F. Stanton Professor of Law, University of Maryland Carey School of Law
Robert V. Percival is the Robert F. Stanton Professor of Law and the Director of the Environmental Law Program at the University of Maryland School of Law. He received a B.A. summa cum laude from Macalester College, a J.D. from Stanford Law School and an M.A. in economics from Stanford University. At Stanford Percival was named the Nathan Abbott Scholar for graduating first in his law school class. Following graduation, he served as a law clerk for Judge Shirley M. Hufstedler of the U.S. Court of Appeals for the Ninth Circuit and for U.S. Supreme Court Justice Byron R. White. He joined the Maryland faculty in 1987 after serving as a senior attorney for the Environmental Defense Fund. Percival has served as a visiting professor of law at Harvard Law School, Georgetown University Law Center, the China University of Political Science and Law (Beijing), and Comenius University (Bratislava). He is the principal author of a leading environmental law casebook, now in its 9th edition, and the author of several articles about the Supreme Court and presidential authority over executive agencies. Percival wrote one of the first articles on the propriety of consent decrees to effectuate and enforce federal law “The Bounds of Consent: Consent Decrees, Settlements and Federal Environmental Policymaking,” 1987 Univ. Chic. Leg. F. 327 (1987). He also is the author of the first comprehensive analyses of what the papers of the late Justices Thurgood Marshall and Harry Blackmun reveal about the Supreme Court’s handling of environmental cases (“Environmental Law in the Supreme Court: Highlights from the Blackmun Papers,” 35 ELR 10637 (2005), and “Environmental Law in the Supreme Court: Highlights from the Marshall Papers,” 13 ELR 10606 (Oct. 1993)).
Judge, United States Court of Appeals, Sixth Circuit
Amul R. Thapar serves as a judge on the United States Court of Appeals for the Sixth Circuit. His judicial career began in 2007 when President George W. Bush nominated him to serve on the Eastern District of Kentucky, making him the first South Asian Article III judge in American history. In 2017, he became President Donald J. Trump’s first appellate court nominee.
Before joining the bench, Judge Thapar served as the United States Attorney for the Eastern District of Kentucky. While United States Attorney, Judge Thapar worked on the Attorney General’s Advisory Committee (“AGAC”) and chaired the AGAC’s Controlled Substances and Asset Forfeiture subcommittee. He also served on the Terrorism and National Security subcommittee, the Violent Crime subcommittee, and the Child Exploitation working group.
Judge Thapar has worked in private practice, at Williams & Connolly in Washington, D.C., and Squire, Sanders & Dempsey in Cincinnati, Ohio. He also served as an Assistant United States Attorney in both the Southern District of Ohio and the District of Columbia.
Judge Thapar received his undergraduate degree from Boston College and his law degree from the University of California, Berkeley. After graduating, Judge Thapar worked as a law clerk to the Honorable S. Arthur Spiegel of the United States District Court for the Southern District of Ohio, and the Honorable Nathaniel R. Jones of the United States Court of Appeals for the Sixth Circuit.
Judge Thapar has also published in the Yale Law Journal, Michigan Law Review, and Catholic University Law Review. He teaches courses on originalism, the Federalists and Anti-Federalists, and legal writing at Notre Dame Law School, the University of Virginia School of Law, and Vanderbilt Law School.
David Daniels Allen Distinguished Chair of Law Director, Climate Change Research Network Co-director, Energy, Environment and Land Use Program, Vanderbilt Law School
Michael Vandenbergh is a leading scholar in environmental and energy law whose research explores the relationship between formal legal regulation and informal social regulation of individual and corporate behavior. His work with Vanderbilt's Climate Change Research Network involves interdisciplinary teams that focus on the reduction of carbon emissions from the individual and household sector. His corporate work explores private environmental governance and the influence of social norms on firm behavior and the ways in which private contracting can enhance or undermine public governance. Before joining Vanderbilt's law faculty, Professor Vandenbergh was a partner at a national law firm in Washington, D.C. He served as Chief of Staff of the U.S. Environmental Protection Agency from 1993 to 1995. He began his career as a law clerk for Judge Edward R. Becker of the U.S. Court of Appeals for the Third Circuit in 1987-88. In addition to directing Vanderbilt's Climate Change Research Network, Professor Vandenbergh serves as co-director of the law school's Energy, Environment and Land Use Program. He was named a David Daniels Allen Distinguished Professor of Law in fall 2013. A recipient of the Hall-Hartman Teaching Award, he teaches courses in environmental law, energy, and property. Professor Vandenbergh has been a visiting professor at the University of Chicago Law School and at Harvard Law School.
Tazewell Taylor Professor of Law and William H. Cabell Research Professor, William & Mary Law School
Jonathan H. Adler joined the William & Mary law faculty as the Tazwell Taylor Professor of Law and William H. Cabell Research Professor in 2025. Prior to joining the faculty, he was the inaugural Johan Verheij Memorial Professor of Law and the founding Director of the Coleman P. Burke Center for Environmental Law at the Case Western Reserve University School of Law.
Professor Adler is the author or editor of seven books, including Climate Liberalism: Perspectives on Liberty, Property and Pollution (Palgrave, 2023), Marijuana Federalism: Uncle Sam and Mary Jane (Brookings Institution Press, 2020), Business and the Roberts Court (Oxford University Press, 2016) and Rebuilding the Ark: New Perspectives on Endangered Species Act Reform (AEI Press, 2011).
His articles have appeared in publications ranging from the Harvard Environmental Law Review and Yale Journal on Regulation to the Wall Street Journal, New York Times, and Washington Post. He has testified before Congress a dozen times, and his work has been cited in the U.S. Supreme Court. A 2024 study identified Professor Adler as the seventh most cited legal academic in administrative and environmental law from 2019 to 2023.
Professor Adler is a contributing editor to Civitas Outlook and a regular contributor to the popular legal blog, The Volokh Conspiracy. A regular commentator on constitutional and regulatory issues, he has appeared on numerous radio and television programs, ranging from the PBS Newshour and National Public Radio to the Fox News Channel and Entertainment Tonight.
Professor Adler is a senior fellow at the Property & Environment Research Center in Bozeman, Montana. In 2018, Professor Adler was elected to membership in the American Law Institute and helped co-found the organization Checks and Balances. In 2024, Professor Adler was appointed a public member of the Administrative Conference of the United States.
Professor Adler clerked for the Honorable David B. Sentelle on the U.S. Court of Appeals for the District of Columbia Circuit.
Professor of Law and Executive Director, Law and Economics Center, Antonin Scalia Law School, George Mason University
Donald Kochan is Professor of Law and Executive Director of the Law & Economics Center (LEC). Professor Kochan is an elected member of the American Law Institute (ALI) and serves as an Adviser to ALI's Restatement of the Law Fourth, Property project. Professor Kochan is a Nonresident Scholar at the Center for the Constitution at Georgetown University Law Center, where he was a Visiting Scholar in residence during Fall 2018. Before joining the Antonin Scalia Law School faculty, he was the Parker S. Kennedy Professor in Law at Chapman University’s Dale E. Fowler School of Law from 2004 to 2020. From 2003 to 2004, Professor Kochan was an Olin Fellow at the University of Virginia School of Law. During 2002-2003, he was a Visiting Assistant Professor of Law at George Mason’s Scalia Law School.
Professor Kochan’s scholarship focuses on areas of property law, constitutional law, administrative law, local government law, natural resources and environmental law, and law & economics. He has published several books and more than 50 scholarly articles and essays in well-regarded law journals. His work has been cited in more than a dozen state and federal court opinions, in more than 75 briefs filed in state and federal courts including more than 25 filed in the U.S. Supreme Court, in dozens of books and treatises, and in more than 800 scholarly articles.
Professor Kochan received his JD from Cornell Law School, where he was a John M. Olin Scholar in Law and Economics and managing editor of the Cornell International Law Journal. During law school, he also served as editor and executive editor of the Harvard Journal of Law & Public Policy symposium issues in 1997 and 1998. He received his BA from Western Michigan University, magna cum laude, with majors in both political science and philosophy, where he studied as the John W. Gill Medallion Scholar and was honored as the Presidential Scholar (awarded to the top graduate in the political science department).
After graduating from law school, Professor Kochan was a law clerk to The Honorable Richard F. Suhrheinrich of the United States Court of Appeals for the Sixth Circuit. Following his clerkship, Professor Kochan was an associate with the firm of Crowell & Moring LLP in Washington, D.C., where he specialized in natural resources & environmental law as well as tort, products, and consumer civil litigation & legislative affairs.
Robert F. Stanton Professor of Law, University of Maryland Carey School of Law
Robert V. Percival is the Robert F. Stanton Professor of Law and the Director of the Environmental Law Program at the University of Maryland School of Law. He received a B.A. summa cum laude from Macalester College, a J.D. from Stanford Law School and an M.A. in economics from Stanford University. At Stanford Percival was named the Nathan Abbott Scholar for graduating first in his law school class. Following graduation, he served as a law clerk for Judge Shirley M. Hufstedler of the U.S. Court of Appeals for the Ninth Circuit and for U.S. Supreme Court Justice Byron R. White. He joined the Maryland faculty in 1987 after serving as a senior attorney for the Environmental Defense Fund. Percival has served as a visiting professor of law at Harvard Law School, Georgetown University Law Center, the China University of Political Science and Law (Beijing), and Comenius University (Bratislava). He is the principal author of a leading environmental law casebook, now in its 9th edition, and the author of several articles about the Supreme Court and presidential authority over executive agencies. Percival wrote one of the first articles on the propriety of consent decrees to effectuate and enforce federal law “The Bounds of Consent: Consent Decrees, Settlements and Federal Environmental Policymaking,” 1987 Univ. Chic. Leg. F. 327 (1987). He also is the author of the first comprehensive analyses of what the papers of the late Justices Thurgood Marshall and Harry Blackmun reveal about the Supreme Court’s handling of environmental cases (“Environmental Law in the Supreme Court: Highlights from the Blackmun Papers,” 35 ELR 10637 (2005), and “Environmental Law in the Supreme Court: Highlights from the Marshall Papers,” 13 ELR 10606 (Oct. 1993)).
Judge, United States Court of Appeals, Sixth Circuit
Amul R. Thapar serves as a judge on the United States Court of Appeals for the Sixth Circuit. His judicial career began in 2007 when President George W. Bush nominated him to serve on the Eastern District of Kentucky, making him the first South Asian Article III judge in American history. In 2017, he became President Donald J. Trump’s first appellate court nominee.
Before joining the bench, Judge Thapar served as the United States Attorney for the Eastern District of Kentucky. While United States Attorney, Judge Thapar worked on the Attorney General’s Advisory Committee (“AGAC”) and chaired the AGAC’s Controlled Substances and Asset Forfeiture subcommittee. He also served on the Terrorism and National Security subcommittee, the Violent Crime subcommittee, and the Child Exploitation working group.
Judge Thapar has worked in private practice, at Williams & Connolly in Washington, D.C., and Squire, Sanders & Dempsey in Cincinnati, Ohio. He also served as an Assistant United States Attorney in both the Southern District of Ohio and the District of Columbia.
Judge Thapar received his undergraduate degree from Boston College and his law degree from the University of California, Berkeley. After graduating, Judge Thapar worked as a law clerk to the Honorable S. Arthur Spiegel of the United States District Court for the Southern District of Ohio, and the Honorable Nathaniel R. Jones of the United States Court of Appeals for the Sixth Circuit.
Judge Thapar has also published in the Yale Law Journal, Michigan Law Review, and Catholic University Law Review. He teaches courses on originalism, the Federalists and Anti-Federalists, and legal writing at Notre Dame Law School, the University of Virginia School of Law, and Vanderbilt Law School.
David Daniels Allen Distinguished Chair of Law Director, Climate Change Research Network Co-director, Energy, Environment and Land Use Program, Vanderbilt Law School
Michael Vandenbergh is a leading scholar in environmental and energy law whose research explores the relationship between formal legal regulation and informal social regulation of individual and corporate behavior. His work with Vanderbilt's Climate Change Research Network involves interdisciplinary teams that focus on the reduction of carbon emissions from the individual and household sector. His corporate work explores private environmental governance and the influence of social norms on firm behavior and the ways in which private contracting can enhance or undermine public governance. Before joining Vanderbilt's law faculty, Professor Vandenbergh was a partner at a national law firm in Washington, D.C. He served as Chief of Staff of the U.S. Environmental Protection Agency from 1993 to 1995. He began his career as a law clerk for Judge Edward R. Becker of the U.S. Court of Appeals for the Third Circuit in 1987-88. In addition to directing Vanderbilt's Climate Change Research Network, Professor Vandenbergh serves as co-director of the law school's Energy, Environment and Land Use Program. He was named a David Daniels Allen Distinguished Professor of Law in fall 2013. A recipient of the Hall-Hartman Teaching Award, he teaches courses in environmental law, energy, and property. Professor Vandenbergh has been a visiting professor at the University of Chicago Law School and at Harvard Law School.
Introduction to the Energy & Environment Working Group
Jeffrey Holmstead
Regulatory Transparency Project's Fourth Branch Video
Jeffrey Holmstead is the Chairman of RTP's Energy & Environment working group and Partner, Bracewell...
Courthouse Steps Decision: National Association of Manufacturers v. DOD
Jonathan H. Adler
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Multiple legal challenges to the Army Corps of Engineers and the Environmental Protection Agency’s controversial...
Capitalism v. Cronyism: What's the True Cost of a Tesla?
Matthew D. Mitchell
Short video featuring Matthew D. Mitchell
Tesla's electric vehicles are a marvel of innovation, but is there more to their price...
Topics
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Environmental Law without Congress
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2017 National Lawyers Convention
It has long been understood that broad congressional delegations of rulemaking authority have empowered administrative...
Environmental Law without Congress
Jonathan H. Adler, Donald J. Kochan, Robert V. Percival, Amul R. Thapar, Michael P. Vandenbergh
2017 National Lawyers Convention
It has long been understood that broad congressional delegations of rulemaking authority have empowered administrative...