Tetra TECH Inc.

Tetra Tech Inc. operates through its Tetra TECH Divisions subsidiary (based in Seattle, Washington) as a prime contractor delivering architect-engineer services, civil works infrastructure design, and water resources engineering to the U.S. Army Corps of Engineers, competing under full and open (no set-aside) procurement without SBA certifications. The parent company, Tetra Tech, Inc., headquartered in Pasadena, California, is a large for-profit consulting and engineering firm with a substantial federal portfolio spanning 212 prime awards valued at $189.7 million across seventeen customer agencies.

Tetra Tech's federal work concentrates in USACE civil works architect-engineer services — water control manual updates, flood risk analysis, dam design and rehabilitation, navigation infrastructure, and geotechnical investigations supporting water resource projects. Representative recent work includes a $2.34 million firm fixed-price delivery order for the Jarvis Creek Flood Control Project at Fort Greely, Alaska (awarded February 2025, completion January 2027); a $1.5 million delivery order for detailed design reports and permitting support for fish screens at the Dexter Fish Facility in Seattle (awarded May 2024, completion September 2025, with Kleinschmidt Associates performing CFD modeling and hydraulic analysis as subcontractor); a $622,945 geotechnical investigation for St. George Harbor Improvement in Alaska (awarded April 2024, completion October 2025); and a $559,478 water control manual update for three dams using West Consultants, Inc. for engineering support.

Customer concentration is heavily weighted to USACE. The top five customer entities account for 82% of combined potential value, dominated by USACE Engineering District Alaska (60 awards, $50.3 million), the USACE Institute for Water Resources (5 awards, $47.2 million), and USACE Engineering District Seattle (39 awards, $28.3 million). Tetra Tech holds two primary indefinite delivery contracts with USACE: a $10 million single-award IDC with ENDIST Seattle for architect-engineer services supporting civil works projects in the Pacific Northwest region (performance period through March 2028, with 3+ million in task orders issued to date), and a $28 million multiple-award IDC with ENDIST Alaska for architect-engineer services supporting civil works infrastructure projects across Alaska (ultimate completion November 2026). The top five parent vehicles carry 119 task orders combined, with the largest concentration under IDC W911KB09D0009 (37 task orders, $5.1 million combined potential value), IDC AG3A75C120007 (28 task orders, $9.7 million), and IDC W912DW09D1017 (27 task orders, $5.6 million). Seven awards carrying $4.3 million in combined potential value face ultimate completion inside the next twenty-four months, exposing recompete risk on active USACE relationships. Tetra Tech engages subcontractors including Kleinschmidt Associates and West Consultants, Inc. on specialized design and engineering support, and Owl Ridge Natural Resource Consultants on regulatory and permitting work. The firm competes as a large business without set-aside restrictions across 205 awards classified under Engineering Services (NAICS 541330) and 175 task orders under the Architect and Engineering—General PSC category.