Daniel E. O'Leary

Dan O’Leary focuses his practice on environmental law and natural resources litigation and related insurance coverage. He has assisted clients in civil litigation in state and federal courts since 1963. Dan provides alternative dispute resolution services in torts, and real estate, in addition to natural resources issues, throughout the Pacific Northwest.


  • LL.M., Environmental and Natural Resources Law, Lewis & Clark Law School
  • J.D., Lewis & Clark Law School
  • B.A., Business, Gonzaga University

Related Practices

  • Environmental Litigation
  • Environmental & Natural Resources
  • Government Relations & Litigation
  • Agribusiness
  • Food & Beverage
  • Asbestos

Admitted to Practice

  • Oregon, 1963
  • U.S. Court of Appeals 9th Circuit
  • U.S. Supreme Court

Contact Daniel E. O'Leary

Davis Wright Tremaine LLP
1300 SW Fifth Avenue
Suite 2400
Portland, Oregon  97201-5610
Phone: 503.778.5203
Fax: 503.778.5299


Service Area

Statewide service provider in:
  • Oregon
  • Washington

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