Former Acting Assistant Attorney General, United States Department of Justice; Partner, Winston & Strawn LLP
Jonathan “Jon” Brightbill is a trial and appellate lawyer in Winston’s Washington, D.C. office, and a partner in the firm’s Litigation and White Collar, Regulatory Defense, and Investigations Practices. He represents public and private companies, corporate officers, and other individuals across white collar, regulatory defense, and government and internal investigation matters and rulemaking challenges, as well as complex commercial disputes, citizen suits, and class actions. His commercial litigation experience encompasses business disputes, false advertising, consumer protection and fraud, FCA, and extensive class action defense work; antitrust and unfair competition matters; and intellectual property litigation, such as trademarks, patents, and trade secrets.
Jon served as the Nation’s lead environmental civil and criminal enforcement official and litigator, as Acting Assistant Attorney General for the Environment & Natural Resources Division (“ENRD”) of the U.S. Department of Justice (DOJ). Jon led ENRD’s 425 lawyers, overseeing 6,500 active matters and managing an annual budget of more than $150 million. Jon brings highly experienced executive leadership from among the most senior level of DOJ on white collar and regulatory enforcement, as well as on federal policymaking and rulemaking development and challenges. He speaks with authority on government decision-making processes, and the arguments and perspectives that move regulators and enforcers, best advising and positioning clients to deal with challenges.
Jon argued many of the government’s most significant cases during his time with the DOJ. This included the Navigable Waters Protection Rule and Clean Water Rule Repeal (10th Cir., district courts), the Affordable Clean Energy Rule and Clean Power Plan Repeal (D.C. Cir), defense of EPA actions on pesticide tolerances under FIFRA and the FDCA (9th Cir. en banc), among numerous others. Jon represented the United States in trial courts in both enforcement and defensive cases, including federal enforcement action against Jeffrey Lowe and the Tiger King Park, of Netflix fame, securing a first-of-its-kind injunction for violations of the Endangered Species Act and Animal Welfare Act. Jon directed the litigation and briefing of scores of additional federal cases nationwide, covering all of the major environmental and natural resources statutes, such as the Clean Air Act, the Clean Water Act, FIFRA (pesticides), FDCA (food safety), TSCA (toxics), CERCLA (land remediation), RCRA (waste), National Environmental Policy Act, Federal Land Policy and Management Act, and numerous other land- and resource-management statutes.
Jon has unmatched experience litigating legal and technical issues relating to climate change. He argued in the courts of appeals, including the D.C. Circuit, regarding the most significant climate change regulations by EPA, as well as the preemptive scope of the Clean Air Act. Jon also litigated climate change-related credit and trading schemes and international agreements in district court. During Jon’s time in leadership at ENRD, it successfully defeated one of the most wide-ranging lawsuits regarding climate change to date—obtaining a stay pending interlocutory appeal and dismissal just weeks before a scheduled three-month trial on federal government liability for climate change.
An accomplished trial lawyer, prior to working at DOJ, Jon was a partner in the Washington, D.C. office of another global law firm. He not only represents clients in court, but creatively counsels corporations on balancing business needs and realities with a broad range of litigation risks and compliance obligations. Jon is also an Adjunct Professor at Georgetown University Law Center. He served on the American Bar Association’s E-Discovery Working Group for Bankruptcy Practice, and was a frequent lecturer for District of Columbia Bar Association Continuing Legal Education Programs.
Jon served as an appellate clerk for the Honorable D. Brooks Smith, U.S. Court of Appeals for the Third Circuit, after graduating magna cum laude from the Georgetown University Law Center. He worked in state government as an Executive Policy Specialist for air, waste, land remediation, and radiation matters at the Pennsylvania Department of Environmental Protection.
President and Chief Policy Officer, CGCN
Throughout his career, Michael Catanzaro has served in several senior energy and environmental policy positions in the federal government, including the House of Representatives, U.S. Senate, the EPA, and the White House.
Before joining CGCN, Catanzaro served as Special Assistant to President Trump for Domestic Energy and Environmental Policy at the White House National Economic Council. In that role, he helped craft energy and environmental policy at multiple agencies and advised the president on the administration’s major policy decisions in that space. He previously served on the Senate Environment and Public Works Committee and on the Bush-Cheney re-election campaign as a top adviser on energy and environmental policy. Catanzaro was Associate Director for Policy in the White House Council on Environmental Quality and Associate Deputy Administrator of the EPA under former President George W. Bush. He also served as a senior adviser to then-Speaker John Boehner on energy and environmental policy.
Deputy Secretary of Energy
James P. Danly was sworn in as Deputy Secretary on June 9, 2025.
Before arriving at the Department, Deputy Secretary Danly was a partner and the Energy Regulatory Group leader at Skadden in Washington, D.C. This followed his service at the Federal Energy Regulatory Commission, first as the Commission’s general counsel then as the commissioner and chairman.
Deputy Secretary Danly was an officer in the United States Army. He served two tours in Iraq, receiving a Bronze Star and a Purple Heart.
A graduate of Yale University, Deputy Secretary Danly earned his J.D. from Vanderbilt University Law School. He clerked for Judge Danny J. Boggs of the Sixth Circuit.
Chairman, Council on Environmental Quality
Mary B. Neumayr is the current Chairman of the Council on Environmental Quality (CEQ). She was unanimously confirmed by the United States Senate on January 2, 2019, and sworn in as Chairman on January 10, 2019. Prior to her appointment, Ms. Neumayr had been serving as CEQ’s Chief of Staff since March 2017.
Before joining CEQ, Ms. Neumayr served in a variety of positions with the Committee on Energy and Commerce in the United States House of Representatives, including as Deputy Chief Counsel, Energy and Environment (2017); Senior Energy Counsel (2011-2017); and Counsel (2009-2010). Ms. Neumayr also served as Deputy General Counsel for Environment and Nuclear Programs at the Department of Energy (2006-2009) and as Counsel to the Assistant Attorney General for the Environment and Natural Resources Division at the Department of Justice (2003-2006).
Prior to her Government service, Ms. Neumayr was in private legal practice from 1989 through 2003 in New York and San Francisco. She received her B.A. from Thomas Aquinas College and J.D. from the University of California, Hastings College of the Law.
Chairman, Council on Environmental Quality
Mary B. Neumayr is the current Chairman of the Council on Environmental Quality (CEQ). She was unanimously confirmed by the United States Senate on January 2, 2019, and sworn in as Chairman on January 10, 2019. Prior to her appointment, Ms. Neumayr had been serving as CEQ’s Chief of Staff since March 2017.
Before joining CEQ, Ms. Neumayr served in a variety of positions with the Committee on Energy and Commerce in the United States House of Representatives, including as Deputy Chief Counsel, Energy and Environment (2017); Senior Energy Counsel (2011-2017); and Counsel (2009-2010). Ms. Neumayr also served as Deputy General Counsel for Environment and Nuclear Programs at the Department of Energy (2006-2009) and as Counsel to the Assistant Attorney General for the Environment and Natural Resources Division at the Department of Justice (2003-2006).
Prior to her Government service, Ms. Neumayr was in private legal practice from 1989 through 2003 in New York and San Francisco. She received her B.A. from Thomas Aquinas College and J.D. from the University of California, Hastings College of the Law.
Federal Permitting Reform: Now or Never?
Jonathan Brightbill, Michael Catanzaro, James P. Danly, Mary B. Neumayr
Is it Now or Never for NEPA Reform?
Join us on Wednesday, October 18th, at 12:00 PM ET for a special lunch panel...
An Examination of the Criminalization of Commercial Activity
Mary B. Neumayr
In the days and weeks following the dramatic collapse of energy giant Enron, the calls...