Thomas L. "Tom" Sansonetti

Thomas L. "Tom" Sansonetti


Holland & Hart LLP

Recognized since 2007

Cheyenne, Wyoming

Practice Areas

Environmental Law

Government Relations Practice

Native American Law

Oil and Gas Law

Navigate to map location for Thomas L. "Tom" Sansonetti
Lawyer of the Year Badge - 2021 - Environmental Law Lawyer of the Year Badge - 2017 - Government Relations Practice Lawyer of the Year Badge - 2016 - Environmental Law Lawyer of the Year Badge - 2015 - Government Relations Practice Lawyer of the Year Badge - 2012 - Government Relations Practice
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A longtime litigator and project team leader, Tom helps clients permit and develop projects with potential obstacles in mind.

Long before a lawsuit can threaten a project, he counsels clients on how to develop effective plans of action that will meet government environmental permitting requirements and stand up to judicial scrutiny when those clients' projects are challenged in court.

Tom joined Holland & Hart in 1993 and built a nationally recognized practice in natural resources and environmental law. Considered an expert in natural resources and environmental matters, Tom served as an Assistant Attorney General for the Environment and Natural Resources Division in the Department of Justice and as the Solicitor and Associate Solicitor for Energy and Resources at the Department of the Interior. He has argued before the U.S. Supreme Court and in seven Federal Circuit Courts of Appeal, and served as a federal prosecutor in environmental crimes cases. Tom’s appellate experience highlights his ability to argue cases at all levels of the federal court system.

Active in politics, Tom was Chairman of the Republican Party in Wyoming from 1983-1987. He also served as Wyoming's Republican National Committeeman (1996-2001) and as General Counsel for the Republican National Committee (2001). Tom served as the Chief of Staff and Legislative Director for Wyoming Congressman Craig Thomas during the 101st Congress.

Contact & Links
Location
  • 2020 Carey Avenue, Suite 800
    Cheyenne, WY 82001
Education
  • Washington and Lee University, J.D., graduated 1976
Bar Admissions
  • Colorado, Colorado Bar Association
  • District of Columbia, The District of Columbia Bar
  • Wyoming, Wyoming State Bar
Affiliations
  • Law Council, Washington & Lee University School of Law - Member

Holland & Hart LLP
Headquarters: Denver, Colorado

169 The Best Lawyers in America® awards

71 Best Lawyers: Ones to Watch® in America awards

Best Law Firms Badge Visit Website View Firm Profile

Lawyer of the Year Badge - 2021 - Environmental Law Lawyer of the Year Badge - 2017 - Government Relations Practice Lawyer of the Year Badge - 2016 - Environmental Law Lawyer of the Year Badge - 2015 - Government Relations Practice Lawyer of the Year Badge - 2012 - Government Relations Practice
Named "Lawyer of the Year" by Best Lawyers® for:
  • Environmental Law, Cheyenne (2021)
  • Government Relations Practice, Cheyenne (2017)
  • Environmental Law, Cheyenne (2016)
  • Government Relations Practice, Cheyenne (2015)
  • Government Relations Practice, Cheyenne (2012)
Recognized in The Best Lawyers in America® 2024 for work in:
  • Environmental Law
  • Government Relations Practice
  • Native American Law
  • Oil and Gas Law
Awards:
  • Who's Who in Energy, Denver Business Journal, 2012-2013
  • Mountain States Super Lawyers, Environmental Law, 2011-2013
  • Chambers USA, 2011-2013; in 2012 and 2013, ranked nationwide for Native American Law
  • Fellow, American College of Environmental Lawyers (ACOEL)

Publications

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