Providing premier environmental and geotechnical solutions since 1988.

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Overview

We are proud to celebrate more than two decades of providing premier environmental and geotechnical solutions to our clients throughout the United States and Pacific Rim.  From seismic retrofit design and consultation to contaminated groundwater assessment and remediation, Treadwell & Rollo's projects are continuously in the spotlight. 

Treadwell & Rollo has been recognized by the San Francisco Business Times Book of Lists as one of the top 20 largest environmental and engineering firms in the Bay Area since 2001.

Additionally, in 2009 we were awarded with the prestigious Phoenix Award (EPA Region 9) for exemplary environmental services provided to the City of Stockton.  Over a 10-year period, we worked with the City to redevelop the Stockton Events Center, a 25-acre waterfront project which has acted as a catalyst for change in downtown Stockton.