Terracon’s Seattle office provides geotechnical engineering, environmental consulting, construction materials engineering and testing, and organizational development services to clients at local, regional, and national levels. While proud of our national clients, Terracon staffs more than 150 professionals committed to the Northwest. We have offices located throughout the Puget Sound including in the cities of Seattle, Mountlake Terrace, Lynnwood, and Tacoma, Washington. Our staff in the Washington offices offer engineering and consulting services for both public and private clients. Terracon routinely works as a prime consultant and as a subconsultant. Our experience includes design-bid-build and design-build projects throughout the Puget Sound region.