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Leland P. Frost

Phone: +1 202.624.2920
1001 Pennsylvania Avenue NW
Washington, DC 20004-2595

Leland Frost is an associate in Crowell & Moring’s Washington, D.C. office and is a member of the Environment & Natural Resources Group, where his practice focuses on litigation and appeals, enforcement, risk assessment, compliance, investigations, and regulatory counseling. His experience covers the Waters of the United States (WOTUS) rule, Toxic Substances Control Act (TSCA), Clean Power Plan, and climate change litigation, as well as Superfund, Occupational Safety and Health Administration (OSHA), and Consumer Product Safety Commission (CPSC) compliance.

Before joining Crowell, Leland was associate general counsel for the National Association of Manufacturers (NAM), where he managed a robust litigation and amicus curiae portfolio including environmental, international, product liability, class actions, technology, constitutional rights, labor and employment, intellectual property, and securities issues. Leland’s NAM experience spanned all levels of the judiciary, including briefs in a dozen state courts, more than four dozen U.S. Supreme Court briefs, and work in international tribunals.

Leland earned his B.A., cum laude, from Furman University and his J.D. from Vanderbilt University Law School, where he served as editor in chief of the Vanderbilt Journal of Transnational Law and as an editor on the Environmental Law and Policy Annual Review. Leland provided research for the book Beyond Politics: The Private Governance Response to Climate Change by Vandenbergh and Gilligan. In his spare time, Leland enjoys advising startups and providing pro bono assistance.

Representative Matters

  • Challenge to Waters of the United States rule jurisdictional issue with a 9 to 0 U.S. Supreme Court win.
  • Intervention in the Toxic Substances Control Act “Inventory Reset” rule litigation.
  • Intervention in litigation over EPA’s streamlined Clean Air Act permit requirements for manufacturers under the New Source Review program.
  • Challenges to OSHA’s silica rule and OSHA’s standards regulating beryllium.
  • Challenge to Risk Management Programs rule under the Clean Air Act.
  • Intervention in challenge to EPA’s refusal to reconsider the Clean Power Plan rule.
  • Challenge to EPA’s New Source Performance Standards for greenhouse gases from electric utilities.


  • Furman University, B.A. (2012) cum laude
  • Vanderbilt University Law School, J.D. (2015)


Admitted to practice: Alabama, District of Columbia, New York, U.S. Supreme Court, U.S. Court of International Trade, U.S. Court of Appeals for the Federal Circuit, U.S. Court of Appeals for the Tenth Circuit, and U.S. District Court for the District of Columbia.

Professional Activities and Memberships

  • Executive Committee, Environmental Law and Property Rights Practice Group, Federalist Society (2019).
  • Leadership Committee, International Energy Law and Transactions, Energy Bar Association (2017).
  • Leadership Committee, Environmental Regulation, Energy Bar Association (2016-2017).
  • Member, Section on Environment, Energy & Resources, American Bar Association.
  • Member, American Society of International Law.
  • Member, Environmental Law Institute.
  • Member, International Bar Association.

View More

"Warning: You May Owe EPA New Risk Evaluation Fees and Reporting Under TSCA," Environment & Natural Resources Law Alert (January 28, 2020). Contacts: Warren Lehrenbaum, Amy Symonds, Michael Boucher, Nina M. MacLeay, Leland P. Frost
Client Alert / Newsletter
"Ninth Circuit Dismisses Kids’ Climate Change Lawsuit Against Federal Government," Environment & Natural Resources Law Alert (January 24, 2020). Contacts: Tracy A. Roman, Elizabeth B. Dawson, Leland P. Frost
Client Alert / Newsletter
Preliminary Injunction Granted Against U.S. Government in Solar Energy Tariff Case (Dec.06.2019)
Firm News / Announcement
"Potential Impact on EPA of Recent Executive Orders Addressing Agency Guidance," Environment & Natural Resources Law Alert (October 17, 2019). Contacts: Peter Gray, Amanda Shafer Berman, John D. Conner, Jr., Daniel W. Wolff, Leland P. Frost
Client Alert / Newsletter
"Legal Trends Impacting Manufacturing," Montana Chamber of Commerce Business & the Law Conference. Helena, MT (March 14, 2018). Presenter: Leland P. Frost.
"Regulatory Compliance and Risk Management," Boating Industry Risk Management Council, The International Boatbuilders’ Exhibition & Conference. Tampa Convention Center, Tampa, FL (September 20, 2017). Presenter: Leland P. Frost.
"Updates on Risk Management Program Rule Amendments and Stichting Greenpeace Case,” American Bar Association’s Section of Environment, Energy, and Resources. Crowell & Moring, Washington, DC (April 7, 2017). Presenter: Leland P. Frost.

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Crowell & Moring LLP is an international law firm with more than 500 lawyers representing clients in litigation and arbitration, regulatory, and transactional matters. The firm is internationally recognized for its representation of Fortune 500 companies in high-stakes litigation, as well as its ongoing commitment to pro bono service and diversity. The firm has offices in Washington, DC, New York, Los Angeles, San Francisco, Orange County, London, and Brussels.

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