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John Voorhees focuses his practice on the rail sector and has advised on major rail disputes across the USA. As a veteran litigator, John also advises clients on compliance counseling, particularly on environmental, health care, fraud and white-collar matters. John has defended Superfund, Clean Water Act and financial cases and other civil and criminal cases during a 47 year career. Voorhees has also served as a federal prosecutor in high-profile cases, represented Fortune 100 companies in high-stakes litigation, and individuals and non-profit organizations in pro bono matters.


  • Rail & Transit Industry Practice
  • Environmental Litigation
  • Investigations (rail, environmental, health care)
  • Environmental Regulatory Policy and International Standards
  • Environmental, Social and Governance Policy
  • Complex Civil and Criminal Litigation



  • Address rail disputes throughout the Western United States.
  • Competition analysis of merger and acquisitions of major “Class 1” rail carriers.
  • Investigations and civil and criminal litigation involving all aspects of rail operations.
  • Contamination disputes throughout New England and the Western United States.
  • Remediation and resolution of claims regarding legacy environmental matters.
  • Civil and criminal litigation of environmental matters throughout the United States.
  • Litigation, investigations and health care policy development for health care providers.
  • Financial fraud, public corruption, and real estate disputes.
  • First international environmental book on environment and governance: International Environmental Risk Management, ISO 14000 and the Systems Approach (CRC Lewis Press 1997) adding ESG, 2nd Edition (CRC Lewis Press 2020).
  • Consultant to Chinese government for restoration of drinking water resources in Wuxi, China.
  • Advocacy regarding Parthenon Sculptures reunification and return to Greece.
  • Moderator and Presenter at International environmental, natural and cultural resources conferences in Warsaw, Prague, Athens, Kuala Lumpur and London.
  • Host and sponsor renewable energy conference in Athens.

Recognition & Leadership

  • Team Member, a Law360 “Environmental Practice Group of the Year, 2022
  • Listed, Legal 500, "Law Firm to Watch - Rail and Road," 2022
  • Listed, The Best Lawyers in America, Administrative/Regulatory Law; Litigation - Health Care; Environmental Law, 2015-2024
    • Named, "Lawyer of the Year," Litigation - Health Care, Denver, 2017, 2019, 2022, and 2024
  • Team Member, U.S. News - Best Lawyers®, Best Law Firms Edition,"Law Firm of the Year," Environmental Law, 2016
  • Rated, AV Preeminent® 5.0 out of 5.0

°AV®, AV Preeminent®, Martindale-Hubbell DistinguishedSM and Martindale-Hubbell NotableSM are certification marks used under license in accordance with the Martindale-Hubbell® certification procedures, standards and policies.


  • J.D., The Catholic University of America, 1976
  • B.A., Emerson College, 1973
  • Hon John W. Kern, III, District of Columbia Court of Appeals, 1976-1977
  • Colorado
  • Arizona
  • District of Columbia
  • New Mexico
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. Court of Appeals for the First Circuit
  • U.S. Court of Appeals for the Second Circuit
  • U.S. Court of Appeals for the Third Circuit
  • U.S. Court of Appeals for the Fifth Circuit
  • U.S. District Court for the District of Colorado
  • U.S. District Court for the District of Columbia
  • U.S. District Court for the District of Massachusetts
  • U.S. District Court for the District of Rhode Island