TETRA TECH INC operating as a corporation is licensed in California under CSLB number 551555. The license was first issued in 1988, putting the business at 38 years on the active CSLB roster. It carries a single CSLB classification: A — General Engineering Contractor. Records show an active surety bond on file with FIDELITY AND DEPOSIT COMPANY OF MARYLAND and active workers' compensation coverage from SAFETY NATIONAL CASUALTY CORPORATION. The business is based in PASADENA, in Los Angeles County, California.