John Simpson


John Simpson headshot

Mr. Simpson began his career as an engineer in structural design and construction, and in the Electric Utility industry, and furthered his education by attending law school at the Lewis and Clark Northwestern College of Law, graduating in 1990. Mr. Simpson is one of the three founding partners of Barker Rosholt & Simpson, LLP. He has served as a member of the National Water Resources Association's Policy Development Committee since 2001, and in 2010 was appointed by the Governor of the State of Idaho as a representative to the Western States Water Council. Mr. Simpson was invited by Governor Little to participate in the Governor’s Salmon Task Force and the appointment was effective beginning in June 2019. He is also one of Idaho Water User Association’s Representatives for the Columbia Basin Partnership negotiations.

Mr. Simpson has been instrumental in assisting clients in litigation and administrative proceedings concerning conjunctive administration of ground and surface water, endangered species act, remediation of ground and surface water, adjudication of Native American water right issues and power generating facilities.

(Boise) Admitted to the Bar, 1990, Idaho; 1992, Oregon and U.S. District Court, District of Idaho; U.S. District Court, District of Oregon. Education: University of Idaho (B.S., 1980); Boise State University (M.B.A., 1987); Lewis and Clark College, Northwestern School of Law (J.D., 1990).

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Areas of Practice

  • Natural Resources Law
  • Water Law
  • Environmental Law
  • Construction Law
  • Litigation


  • Idaho and Oregon State Bars and American Bar Association
  • Section on Natural Resources and Environmental Law