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Kathryn (Katie) L. Lannon

Senior Associate
Washington, D.C.

Kathryn (Katie) L. Lannon

Katie Lannon counsels and advocates for clients on environmental and safety matters, with a focus on the transportation industry. Katie represents corporations and trade associations before various federal courts, departments, and administrative agencies, including the U.S. Environmental Protection Agency (EPA), the U.S. Fish and Wildlife Service (FWS), the U.S. Army Corps of Engineers, the National Highway Traffic Safety Administration, the Surface Transportation Board, the Pipeline and Hazardous Materials Safety Administration, and the Federal Railroad Administration.

Katie regularly counsels clients on compliance with new and existing environmental regulations, including Clean Air Act mobile source regulations and Federal Motor Vehicle Safety Standards. Katie works closely with clients to submit comments to agency proposed rulemakings and draft guidance on issues critical to their business. Katie also works actively with clients in responding to agency information requests, including asserting and substantiating business confidentiality claims, as well as submitting Freedom of Information Act and other requests for release of agency information. She has filed and intervened in lawsuits on behalf of industry clients challenging agency actions in federal district and appellate courts under the Clean Air Act, Clean Water Act, Endangered Species Act, Administrative Procedure Act, and Freedom of Information Act.

Katie served as an adjunct professor with the Journal of Energy and Environmental Law at The George Washington University Law School for five years. Prior to joining our legal practice, Katie served as a judicial law clerk to the Honorable Emily C. Hewitt, Chief Judge of the U.S. Court of Federal Claims. While in law school, Katie interned with the Office of Enforcement and Compliance Assurance at the EPA and for the Honorable Stephen H. Glickman, Associate Judge of the D.C. Court of Appeals. In law school, she served as a member of The George Washington Law Review, as president of the Environmental Law Association, and as a legal fellow in the Small Business and Community Economic Development Clinic. Prior to attending law school, Katie worked as a wilderness program director and outdoor instructor.

Education and admissions


  • J.D., with highest honors, Order of the Coif, The George Washington University Law School, 2009
  • B.S., Davidson College, 1999


  • American Bar Association (Section of Environment, Energy, and Resources)
  • DC Bar Association (Environment, Energy, and Natural Resources Section)
  • Women's Council on Energy and the Environment (WCEE)

Bar admissions and qualifications

  • District of Columbia
  • North Carolina

Court admissions

  • U.S. Court of Appeals, District of Columbia Circuit
  • U.S. Court of Federal Claims
  • U.S. District Court, District of Columbia


Rising Star, Environmental, State, Local & Municipal

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