Areas of Practice

Bar Admissions

  • District of Columbia
  • Maryland

Court Admissions

  • U.S. Supreme Court
  • U.S. Court of Appeals for the District of Columbia
  • U.S. Court of Appeals for the Fifth Circuit
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. District Court for the District of Columbia


  • J.D., magna cum laude, American University, Washington College of Law, 1985
    Law Review
  • B.S., magna cum laude, Georgetown University, Walsh School of Foreign Service, 1980

Judicial Clerkships

  • U.S. Court of Appeals for the District of Columbia Circuit, 1985 - 1986
T +1 202.344.4696
F +1 202.344.8300

Kathryn Kusske Floyd


Kathryn Floyd is a partner in the firm’s Environmental Law Practice Group and has twenty years of nationwide experience counseling and representing companies from various industries in matters pertaining to regulatory and environmental affairs and litigation aspects of large infrastructure and development projects. Her clients include leading businesses in agricultural, biotechnology, transportation including rail, transit, aviation, intermodal and ports mining and renewable energy.

She has extensive experience counseling companies regarding controversial hot-button projects that draw attention from regulatory agencies and outside groups threatening litigation or disruptions. Kathryn consistently helps clients shape strategic responses and catalogue a documented record to minimize risk, advance approvals and, when necessary, defend legal challenges/lawsuits. Many of these engagements arise when clients’ projects face opposition under environmental laws such as the National Environmental Policy Act, the Clean Water Act, the National Historic Preservation Act and the Endangered Species Act.

Additionally, Kathryn appears before a wide variety of federal agencies on rulemakings, administrative proceedings, and policy issues, including the U.S. Department of Agriculture, the U.S. Department of Transportation, the U.S. Department of Energy, the Surface Transportation Board, the Environmental Protection Agency,  the U.S. Army Corps of Engineers, and the Advisory Council on Historic Preservation, to name a few.

Kathryn has amassed an impressive record of favorable court decisions on behalf of her clients, including working with coalitions of industry groups successfully challenging federal agency action. 

Significant Matters

  • Successful licensure and permitting of numerous freight and transit rail capacity enhancement and market extension projects throughout the U.S.;
  • Cross-border transportation and energy infrastructure projects;
  • Counsel mining clients on  the application of the National Environmental Policy Act, the National Historic Preservation Act, the Clean Air Act, the Clean Water Act, Endangered Species Act and other environmental statutes to the development of new mining projects;
  • Successful reinstatement of suspended Clean Water Act mining permit; and
  • Represent agricultural and biotech interests before the U.S. Supreme Court and other federal courts.