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Sarah E. Dennison-Leonard

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Click to Email: sdleonard@martenlaw.com

Sarah’s practice focuses on complex commercial and regulatory transactions, particularly those related to the energy industry. She has substantial experience with federal and state utility laws and regulations and their associated governmental commissions, agencies, and boards. Sarah has also served as lead facilitator or legal counsel for several major projects involving regional transmission operations and infrastructure development.

Sarah regularly counsels regulated and unregulated utilities and other energy-industry companies in: development, construction, and acquisition of major infrastructure assets; drafting and negotiating multi-party joint project development, management, and operating agreements; energy generation, transmission, distribution, renewable resource development; power purchase arrangements; software licensing and user agreements; professional service contracts; administrative rulemaking; regulatory proceedings for review and approval of power and transmission rates; and facilitation and team building for multilateral projects.

Sarah serves as outside general counsel for one of the Northwest’s longest-standing operational coordination organizations, and in that capacity has served as lead drafter for several first-of-their-kind multi-party cooperative compliance programs. Sarah also represents investor-owned, private, and publicly owned energy and utility organizations in major contract and settlement negotiations, litigation before the United States Court of Appeals for the Ninth Circuit and the Federal Energy Regulation Commission, and employee training.


  • Marten Law PLLC, Portland, OR (2017-present)
  • Dennison-Leonard Law (2007-2017)
  • Van Ness Feldmann LLP (2006-2007)
  • Krogh & Leonard (1998-2006)
  • Stoel Rives, LLP (1994-1998)


  • J.D., with distinction, Stanford Law School (1994)
  • B.A., magna cum laude, Smith College (1986)


  • Oregon State Bar
  • Washington State Bar
  • United States Court of Appeals for the Ninth Circuit

Professional Activities

  • Business Law Section, Oregon State Bar
  • Energy, Telecommunications, and Utility Law Section, Oregon State Bar

Select Publications and Speeches

  • The Federal Energy Regulatory Commission’s Rules Prohibiting Electricity Market Manipulation – November 2015
  • Law Seminars International – Transmission Coordination Through the Northwest Power Pool Members’ Market Assessment and Coordination Committee Initiative – January 2014
  • The Northwest Power Act Residential Exchange Program: Statutory History, Litigation, and Settlement Agreement – June 2011