Skip navigation


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:

Main office (Massachusetts)

Phone: +1(617) 627-3786
Address: 11 Curtis Avenue, Somerville, MA 02144-1224
Open in Google Maps

California office

Phone: +1(530) 753-3035
Address: 400 F Street, Davis, CA 95616
Open in Google Maps

Seattle office

Phone: +1(206) 547-4000
Address: 1402 Third Avenue Suite 925, Seattle, WA 98101
Open in Google Maps

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

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 non-profit research organization with 501c(3) status. Available below are 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 under the About section of this website (see annual reports).





Annual reports

SEI US annual 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.