Welcome to Tetra Tech Rizzo

On January 28, 2008, Tetra Tech Rizzo acquired Daylor Consulting Group, a 40-person engineering, planning, and environmental firm based in Braintree, Massachusetts.

“The merger of our companies will allow us to offer an even broader array of services such as land planning and survey to our clients” notes Brian Sullivan, President of Tetra Tech Rizzo. Tetra Tech Rizzo provides civil engineering; transportation planning and design; assessment, remediation, compliance; and natural resource services in New England and abroad.

“Selling the company to an industry leader with local roots and an international reach was vitally important to me. I look forward to the opportunity to bring our vast new resources to our clients states Bob Daylor, founder of Daylor Consulting Group.

Tetra Tech Rizzo is a division of Tetra Tech, a leading provider of consulting, engineering, and technical services, based in Pasadena, California. Tetra Tech is a publicly traded company, with more than 8,500 associates in over 350 offices worldwide. Engineering News Record ranks Tetra Tech the 8th largest design firm.