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Marten Law Continues Expansion of its National Energy and Environmental Law Practice

Firm News

April 27, 2021

Seattle, WA (April 27, 2021) – Marten Law is pleased to announce the addition of Tanya Nesbitt, Sara Cloon and Katy Guillou to our energy, environmental and regulatory law practice. All three are experienced in the complex litigation, transactional and regulatory matters that impact the financial institutions, energy, technology, manufacturing, food and transportation companies we represent.

Tanya Nesbitt has worked in both private practice, and as a trial attorney with the U.S. Department of Justice, Environment and Natural Resources Division (DOJ), and as a Special Assistant Attorney with the U.S. Attorney’s Office in Washington D.C. At DOJ, Tanya represented the Department of Interior and various other federal agencies responsible for the stewardship of public lands and natural resources. At the U.S. Attorney’s office, she first-chaired over 35 bench trials.

Sara Cloon, like Tanya, is a litigator who has counseled clients on toxic tort, chemical contamination, and permitting matters. She is experienced in resolving disputes under the Clean Water Act, Clean Air Act, RCRA, and other federal and state environmental laws. Sara graduated from the University of Notre Dame Law School, where she was an editor of the Journal of Law, Ethics, and Public Policy. Sara clerked for the Honorable Chief Judge Thomas O. Rice of the Eastern District of Washington. She also served as a judicial extern for Justice Mary Yu of the Washington Supreme Court.

Katy Guillou is a policy analyst who has over 25 years of public and private experience in environmental law and policy, including working in the Natural Resources Division of the Office of General Counsel of the United States Department of Agriculture, where she advised the U.S. Forest Service on issues involving the Endangered Species Act, the National Environmental Policy Act, the National Forest Management Act, Federal Power Act, and Superfund.

Tanya can be reached at; Sara can be reached at; and Katy can be reached at


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The world is changing and Marten Law is growing to meet the needs of our clients. Established almost 20 years ago, the firm has developed a deep bench working with renewable and traditional energy producers, manufacturers, local governments, real estate developers, food producers and agribusinesses, transportation companies, financial institutions, fish processors, forestry and natural resource companies, and many others. We attract talented lawyers interested in helping our clients grow during a time of rapid change, and are expanding on both coasts. If you are interested in joining us, visit

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