Featured Projects

We work with municipalities, special districts, farmers, and private industry in the Pacific Northwest, California, and internationally.

San Antonio Creek Basin SGMA Support and GSP Development

Portland Harbor Superfund Site: River Mile 11 East Cleanup

Pasco ASR Feasibility Study

Morro Bay Water Reuse Feasibility Analysis Support

Upper Klamath Basin Drought Planning

Our Team

Most of our projects come from clients who hire us again and again. That's because they value the practical expertise we bring to the table and our commitment to long-term partnerships.


We hire driven and talented people looking to shape the future of GSI. If you are motivated to grow your practice and invest in your career, get in touch.

Office Locations

We work in the Pacific Northwest, California, and internationally from our five West Coast offices.

Latest News

GSI at Battelle Sediments Conference

Several GSI employees will be presenting at the Battelle International Conference on the Remediation…