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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.


General questions:

Main office (Massachusetts)

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

Phone: +1(530) 753-3035
Address: 400 F Street, Davis, CA 95616
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Seattle office

Office currently not in use due to COVID-19 restrictions.  Please contact main office until further notice.

Board of Directors

Our Directors are invited to hold seats on the SEI-US Board for two-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
  • Dennis McLerran , Former Regional Administrator, Region 10, U.S. Environmental Protection Agency
  • Eileen Quigley , Founder and Director, Clean Energy Transition
  • Elizabeth Soderstrom , Strategic Partnerships Officer, The Water Foundation
  • Linda M. Abriola , Director, Tufts Institute of the Environment

Audited financial statements

The SEI U.S. Center is a non-profit research organization with 501c(3) status. Follow the links below for simple audited financial statements, tax returns (Form 990), and single audit reports (per OMB Circular A-133). Financial statements for the SEI Foundation in Sweden are available on the SEI International website.




Annual reports

SEI U.S. Center Reports offer an overview of each year’s most important developments, as well as a listing of projects and publications for that year. Annual reports for the institute as a whole are available under the About section of this website.