GSI is a specialized consulting firm that provides innovative solutions to our clients’ groundwater, environmental contamination, and water resource challenges. We work with municipalities, special districts, agribusinesses, and private companies in the Pacific Northwest, California, and internationally.

Our Story

In 2000, founders Larry Eaton, Jeff Barry, and Walt Burt left their careers at a large consulting firm to form a small client- and employee-focused company. In those days, we were just a few hydrogeologists in a house in Southeast Portland. Today, we are an employee-owned S-corporation with more than 50 staff members across five offices in two states.

Since our founding, we have worked with more than 300 clients in the public and private sectors, from city governments to international companies. We have three main focus areas: Groundwater Services, Environmental Management, and Water Rights and Resource Planning.

We are experts in hydrogeology, hydrology, remedial engineering, water resources, and environmental science. We also offer complete in-house GIS, graphics, technical writing and editing, and document production.