Thomas Sansonetti

Hon. Thomas Sansonetti

Partner, Holland & Hart LLP

A longtime litigator and project team leader, Tom Sansonetti 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 has built a nationally recognized practice in natural resources and environmental law. Considered an expert in natural resources and environmental matters, Tom has served as one of the top leaders in the Department of Justice and also has held the third-ranking position in the Department of the Interior. He has argued before the U.S. Supreme Court and in several Federal Circuit Courts of Appeal, and has 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.


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