GEI Consultants

GEI Consultants has spent more than five decades working the ground beneath big projects. Founded in 1970 and based in Woburn, Massachusetts, the employee-owned firm runs geotechnical, environmental, water resources, and ecological engineering out of offices across the U.S. and Canada, with a staff north of 1,400. Its engineers have logged work on more than 50,000 projects in all 50 states, from dam safety and tunneling to contaminated-site cleanup. On the Anderson Dam seismic retrofit in California, GEI supports construction management for one of the country’s largest dam rebuilds. The firm’s reach spans transportation, energy, water, and industrial clients who need someone to read the soil before the concrete goes in.

GEI Consultants is an engineering and science consultancy founded in 1970 and headquartered at Unicorn Park Drive in Woburn, Massachusetts. It describes itself as the largest geoenvironmental firm headquartered in New England, and it works nationally from roughly 30 offices.

The firm’s expertise clusters around the ground and water: geotechnical engineering, water resources, environmental consulting and ecological science. That combination puts GEI on the kind of projects where the challenge is below grade or tied to how a site handles water — foundations on difficult soils, dams and levees, contaminated-site remediation, and infrastructure that has to withstand hydrological loads.

Scale matters in this specialty because reference experience is hard-won. GEI reports having completed more than 25,000 projects across the United States, Canada and more than 20 other countries, a depth of precedent that owners and design teams lean on when conditions get complicated.

The firm has also been growing, having merged in 2023 with GM BluePlan Engineering and Lithos Engineering to broaden its capabilities. For engineers, contractors and public agencies in New England, the Woburn headquarters is the anchor of a firm whose reach now extends coast to coast and across borders.