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SEI US has offices in Somerville, Massachusetts, Davis, California and Seattle, Washington. The center conducts research and engages with decision-makers and civil society on energy, water, and climate policy as well as on broader dimensions of development, sustainability, and equity. It builds capacity through training and collaboration, and its decision-support tools are used widely around the globe. SEI US is a research affiliate of Tufts University in Massachusetts.

SEI US employees share a passion for interdisciplinary, objective research, and analysis focused on pressing environmental and global development challenges.


General questions: [email protected]

Main office (Massachusetts)

Phone: +1(617) 627-3786
Address: 11 Curtis Avenue, Somerville, MA 02144-1224
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California office

Address: 501 Second Street, Davis, CA 95616
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Seattle office

Phone: +1(206) 547-4000
Address: 1402 Third Avenue Suite 925, Seattle, WA 98101
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Board of Directors

Our Directors are invited to hold seats on the SEI US Board for three-year renewable terms and are selected for the broad professional experience and perspectives they can bring to the governance of the Institute. Current Directors hold or have held positions in academia, governmental environmental agencies, foundations and other non-profit research organizations.

  • Måns Nilsson (Chair), Executive Director, Stockholm Environment Institute
  • Susan Julius, Environmental Assessment Specialist, U.S. Environmental Protection Agency
  • Eileen Quigley , Founder and Director, Clean Energy Transition Institute
  • Elizabeth Soderstrom , Strategic Partnerships Officer, The Water Foundation
  • Linda M. Abriola , Joan Wernig and E. Paul Sorensen Professor of Engineering, Brown University School of Engineering
  • Nicolas di Sbroiavacca , Presidente Ejecutivo, Fundacion Bariloche
  • Rachel Cleetus , Policy Director, Climate and Energy Program, Union of Concerned Scientists

Organizational chart

Organizational chart. The following departments report to the Centre Director: Finance and Operations, and Communications. Five programs report to the Centre Director: Water Program, Climate Policy Program, Energy Modelling Program, Equitable Transitions Program, Sustainable Bioenergy and Development Program.

Audited financial statements

SEI US is a 501c(3) non-profit research organization. Available below are audited financial statements and the IRS Form 990 tax return. Financial statements for the SEI Foundation in Sweden are available under the About section of this website (see annual reports).