Tetra Tech, Inc.

Tetra Tech, Inc. is an American consulting and engineering services firm headquartered in Pasadena, California. The company's core mission is to lead with science to create a more sustainable future, focusing on addressing the entire water cycle, protecting and restoring the environment, and designing sustainable and resilient infrastructure globally.

Tetra Tech provides high-end consulting and engineering services across diverse sectors, including water, environment, infrastructure, resource management, energy, and international development. Their comprehensive offerings span applied science, data analysis, research, engineering design, project management, construction management, and operations and maintenance. The firm serves a broad clientele, including federal, state, and local governments, as well as commercial and industrial entities worldwide.

In a recent leadership transition, Roger Argus was promoted to Chief Executive Officer in February 2026, succeeding Dan Batrack, who assumed the role of Executive Chairman. The company has secured notable contracts, including a $15 million multiple-award contract from the Los Angeles Department of Water and Power for environmental and digital automation services, and a $49 million multiple-award contract from the U.S. Army Corps of Engineers for architect-engineer services. Tetra Tech differentiates itself through its "Leading with Science®" approach and utilizes its Tetra Tech Delta suite of digital solutions, which integrates advanced data analytics and artificial intelligence.