Partner, Secil Law
John Irving brings nearly three decades of experience in white collar criminal defense, government investigations, and high-stakes congressional and corporate inquiries. A former federal prosecutor and trusted advisor within the U.S. Department of Justice and the Environmental Protection Agency, John is known for his calm under pressure, strategic clarity, and unwavering discretion.
His clients have included Members of Congress, senior executives, political appointees, and corporate entities navigating complex criminal, civil, and regulatory matters—including matters that have dominated national headlines. John’s practice today is defined by sophisticated representation in sensitive investigations, classified matters, and strategic crisis response—often involving multiple enforcement authorities.
John served for over a decade in the U.S. Department of Justice, including as an Assistant U.S. Attorney in Washington, D.C., where he prosecuted a wide range of criminal cases and appeared regularly in court. He later served as Counsel to two Deputy Attorneys General and as Counsel to the Assistant Attorney General of DOJ’s Environment and Natural Resources Division, advising on departmental policy and enforcement matters at the highest levels.
Prior to his tenure at DOJ, John served as Investigative Counsel to the (then-named) U.S. House Committee on Government Reform & Oversight and as an Associate Independent Counsel in the investigation of former HUD Secretary Henry Cisneros.
Before joining SECIL Law, John was a Partner at E&W Law, a boutique firm focused on environmental and white-collar litigation, and previously spent over a decade at Holland & Knight LLP in Washington, D.C. There, he was a key member of the firm’s White-Collar Defense, Investigations & Compliance team.
His private practice experience includes:
John’s clients appreciate his deep fluency in government processes, his strategic precision in high-pressure moments, and his ability to quietly resolve matters that others cannot.
Senior Legal Fellow, the Meese Institute for the Rule of Law, Advancing American Freedom
Paul J. Larkin is a Senior Legal Fellow in the Meese Institute for the Rule of Law at Advancing American Freedom. Paul has held various positions in the federal and state governments throughout his career, such as being an attorney in the Organized Crime and Racketeering Section of the Criminal Division at the U.S. Department of Justice, an Assistant to the Solicitor General in the Office of the Solicitor General at the U.S. Department of Justice, Special Agent-in-Charge and Acting Director of the Criminal Investigation Division at the Environmental Protection Agency, and a member of the Parole Abolition and Sentencing Reform Commission and of the Juvenile Justice Reform Commission in the Office of Virginia Governor George Allen.
He has also worked at Verizon Communications and two law firms in Washington, D.C. His current research is principally in the fields of drug policy, criminal justice policy, and administrative law and policy. He has published numerous articles in law and public policy journals, both in print and online.
Chief Policy Counsel, Council on Criminal Justice and Senior Advisor, Right on Crime
Marc A. Levin is the Chief Policy Counsel for the Council on Criminal Justice (counciloncj.org) and Senior Advisor for Right on Crime.
An attorney and accomplished author on legal and public policy issues, Marc began the Foundation’s criminal justice program in 2005. This work contributed to nationally praised policy changes that have been followed by dramatic declines in crime and incarceration in Texas. Building on this success, in 2010, Levin developed the concept for the Right on Crime initiative, a TPPF project in partnership with Prison Fellowship and the American Conservative Union Foundation. Right on Crime has become the national clearinghouse for conservative criminal justice reforms and has contributed to the adoption of policies in dozens of states that fight crime, support victims, and protect taxpayers.
In 2014, Levin was named one of the “Politico 50” in the magazine’s annual “list of thinkers, doers, and dreamers who really matter in this age of gridlock and dysfunction.”
Marc has testified on criminal justice policy on four occasions before Congress and has testified before legislatures in states including Texas, Nevada, Kansas, Wisconsin, and California. He also has met personally with leaders such as U.S. Presidents, Speakers of the House, and the Justice Commtitee of the United Kingdom Parliament to share his ideas on criminal justice reform. In 2007, he was honored in a resolution unanimously passed by the Texas House of Representatives that stated, “Mr. Levin’s intellect is unparalleled and his research is impeccable.”
Since 2005, Marc has published dozens of policy papers on topics such as sentencing, probation, parole, reentry, and overcriminalization which are available on the TPPF website. Levin’s articles on law and public policy have been featured in publications such as the Wall Street Journal, USA Today, Texas Review of Law & Politics, National Law Journal, New York Daily News, Jerusalem Post, Toronto Star, Atlanta Journal-Constitution, Philadelphia Inquirer, San Francisco Chronicle, Washington Times, Los Angeles Daily Journal, Charlotte Observer, Dallas Morning News, Houston Chronicle, Austin American-Statesman, San Antonio Express-News and Reason Magazine.
In 1999, Marc graduated with honors from the University of Texas with a B.A. in Plan II Honors and Government. In 2002, Marc received his J.D. with honors from the University of Texas School of Law. Marc was a Charles G. Koch Summer Fellow in 1996. He served as a law clerk to Judge Will Garwood on the U.S. Court of Appeals for the Fifth Circuit and Staff Attorney at the Texas Supreme Court.
Senior Fellow and Director of Constitutional Studies, Manhattan Institute
Ilya Shapiro is a senior fellow and director of constitutional studies at the Manhattan Institute and a contributing editor of City Journal. Previously he was executive director and senior lecturer at the Georgetown Center for the Constitution, and before that a vice president of the Cato Institute.
Shapiro is the author of Lawless: The Miseducation of America’s Elites (2025) and Supreme Disorder: Judicial Nominations and the Politics of America’s Highest Court (2020), coauthor of Religious Liberties for Corporations? (2014), and editor of 11 volumes of the Cato Supreme Court Review (2008-18). He has contributed to a variety of academic, popular, and professional publications, including the Wall Street Journal, Harvard Journal of Law & Public Policy, Washington Post, Los Angeles Times, USA Today, National Review, and Newsweek. He also regularly provides commentary for various media outlets, writes the Shapiro’s Gavel newsletter on Substack, and once appeared on the Colbert Report.
Shapiro has testified many times before Congress and state legislatures and has filed more than 500 amicus curiae “friend of the court” briefs in the Supreme Court. He lectures regularly on behalf of the Federalist Society, is a member of the board of fellows of the Jewish Policy Center, was an inaugural Washington Fellow at the National Review Institute, and has been an adjunct law professor at the George Washington University and University of Mississippi. He is also the chairman of the board of advisers of the Mississippi Justice Institute, a barrister in the Edward Coke Appellate Inn of Court, and a former member of the Virginia Advisory Committee to the U.S. Commission on Civil Rights.
Earlier in his career, Shapiro was a special assistant/adviser to the Multi-National Force in Iraq on rule-of-law issues and practiced at Patton Boggs and Cleary Gottlieb. Before entering private practice, he clerked for Judge E. Grady Jolly of the U.S. Court of Appeals for the Fifth Circuit. He holds an AB from Princeton University, an MSc from the London School of Economics, and a JD from the University of Chicago Law School.
Publius comes from the pen name Alexander Hamilton, James Madison, and John Jay used when they wrote 85 publicly printed letters now known as the Federalist Papers. Hamilton chose “Publius” as a name that would represent friends of the newly proposed American republic - Publius Valeria Publicola was a Roman general who helped to found the Roman Republic. The Federalist Society continues the tradition of publishing things under the name Publius in celebration of our constitutional roots and recognition that author credit is not always necessary.
Assistant Attorney General, Environment and Natural Resources Division, U.S. Department of Justice
Jeffrey Bossert Clark was born in Philadelphia, Pennsylvania on April 17, 1967. He is a graduate of Harvard University (A.B. in economics and history, 1989), the University of Delaware (M.A. in urban affairs and public policy, 1993), and the Georgetown University Law Center (J.D., 1995).
Mr. Clark began his career working for the State of Delaware’s Department of Finance, Division of Revenue as an economics analyst in the field of tax policy. During his tenure from 1989 to 1992, he authored several white papers analyzing Delaware revenue sources. Delaware also selected Mr. Clark to submit an economic report and affidavit to the United States Supreme Court in the original jurisdiction case of Delaware v. New York, 507 U.S. 490 (1993).
He entered Georgetown’s law school in 1992 where he earned honors as an articles editor of the Georgetown Law Journal, an Olin Law & Economics Fellow, and a member of the Order of the Coif. From 1995 to 1996, Mr. Clark clerked for Judge Boggs of the U.S. Court of Appeals of the Sixth Circuit. Mr. Clark then joined the law firm of Kirkland & Ellis as an associate from 1996-2001. He worked as an appellate litigator on numerous Supreme Court and other appellate cases and developed expertise in administrative law, statutory interpretation, as well as antitrust, labor, environmental, and telecommunications law.
Mr. Clark went on to serve in ENRD from 2001-2005 as a Deputy Assistant Attorney General selected by Attorney General Ashcroft and Assistant Attorney General Tom Sansonetti. In that capacity, he supervised ENRD’s Appellate and Indian Resources Sections. He reviewed, edited, and contributed to virtually every brief that ENRD filed in the Courts of Appeals, including several cases of exceptional significance that he personally briefed and argued. During his service in the early 2000s, Mr. Clark argued and won numerous cases in multiple U.S. Courts of Appeals and worked on all Supreme Court cases arising out of ENRD’s work.
In 2005, Mr. Clark returned to Kirkland & Ellis LLP as a partner, where he litigated until his return to ENRD in 2018. There he worked on numerous multi-billion-dollar matters and continued to argue many appellate cases. His practice operated at all levels — appellate litigation, trial court litigation, agency proceedings, and regulatory and litigation counseling. He has been named a Super Lawyer for multiple years running, highlighted in the Legal 500, named to the “Legal Who’s Who for Environmental Law” in Corporate Responsibility Magazine, rated A.V. preeminent by Martindale Hubbell, and named a member of the National Association of Distinguished Counsel’s Nation’s One Percent. He also was named one of America’s Top 100 High Stakes Litigators.
President Trump nominated Mr. Clark to be the Assistant Attorney General of the Environment and Natural Resources Division (ENRD) on June 7, 2017. He was confirmed by the U.S. Senate on October 11, 2018 and sworn into office on November 1, 2018, followed by an investiture ceremony on November 15, 2018.
Criminal and Civil Enforcement of Environmental Laws
John Irving
This Teleforum will provide an overview of criminal and civil enforcement provisions of environmental laws...
Justice Department and Marijuana Enforcement
Paul James Larkin, Marc Levin, Ilya Shapiro
On Thursday, January 4th, Attorney General Jeff Sessions withdrew a Justice Department memo issued in...
Judicial Ethics (Alabama)
Publius
In litigation pending since 1996, 3,500 plaintiffs sued the Monsanto Company and two successor corporations...
Colloquium: Junk Science, the Courts, and the Regulatory State (part I)
Jeffrey Bossert Clark
The Federalist Society's three E.L. Wiegand Practice Groups in Administrative Law & Regulation, Environmental Law...