Jonathan W. Dettmann



Jon is a trial and appellate lawyer who prosecutes and defends lawsuits for individuals and businesses. He represents clients in cases involving major environmental disasters, government contracts and programs, and commercial and intellectual property disputes. Jon is an effective and experienced manager of large, multiparty cases and helps his clients navigate through complex legal issues to achieve a successful result.

Jon has represented:

  • Commercial fishermen and businesses across the Gulf Coast impacted by the Deepwater Horizon oil spill in claims against BP, Transocean and Halliburton
  • Health insurers pursuing claims against the federal government relating to Risk Corridors and Cost Sharing Reduction payments under the Affordable Care Act
  • Property owners in federal lawsuits against FEMA and private insurers for property damage from hurricane events
  • Software development companies pursuing breach of contract claims against the State of Minnesota
  • Local governments in state, federal and international legal claims over catastrophic flooding problems in Devils Lake
  • Businesses and individuals in litigation against the State of Alaska over wildland firefighting operations
  • Commercial fishermen and businesses in Alaska impacted by the Exxon Valdez oil spill
  • Public and private companies in intellectual property disputes involving patents, patent licenses, trademarks, trade dress, and trade secrets


Bar Admissions


Court Admissions

U.S. Court of Appeals for the Tenth Circuit
U.S. Court of Appeals for the Eleventh Circuit
U.S. Court of Appeals for the Eighth Circuit
U.S. Court of Appeals for the District of Columbia Circuit
U.S. Court of Appeals for the Federal Circuit
U.S. District Court for the District of Minnesota
U.S. Supreme Court


University of Virginia School of Law
J.D. Law Review (1995)

Yale University
B.A. (1990)

Insights & Events

Other Perspectives
  • Lessons From the Deepwater Horizon Oil Spill Litigation
    Loyola University New Orleans College of Law, March 2018
  • The Impact of the BP Oil Spill
    Loyola University New Orleans College of Law, November 2015

Leadership & Community

Pro Bono

  • Served as lead counsel on cases involving the protection areas of the National Wilderness Preservation System from Florida to Alaska.

Civic Activities

  • River Grove Elementary School (Marine on St. Croix, Minnesota) — Founders Board, 2016-present
  • Climate Generation, A Will Steger Legacy (Minneapolis, Minnesota) — Board of Directors, 2010-present
  • Wilderness Watch (Missoula, Montana) Board of Directors, 2003-11
  • William Mitchell College of Law — Adjunct Professor of Law, Administrative Law, Spring 2010
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