Tetra TECH EC, Inc.

Tetra TECH EC, Inc., doing business as Tetra TECH, is a subsidiary of global consulting and engineering firm Tetra Tech, Inc., and operates as a prime contractor delivering environmental remediation, aqueous film-forming foam (AFFF) replacement, military munitions response, and hazardous waste compliance services to the Department of Defense on a full-and-open competitive basis—99% of recent awards are primes, with no set-aside designations across the portfolio.

Tetra TECH EC operates from Huntsville, Alabama, with primary NAICS focus on remediation services (61 of 83 awards) and environmental consulting (15 awards), coded primarily under PSC R425 (environmental systems protection and remediation). The company holds seats on four large, high-dollar IDIQ vehicles anchoring its federal work: the $800 million Aqueous Film Forming Foam MATOC (13 task orders, $35.8 million combined potential value), the $500 million International Remediation and Environmental Services - Generation Two contract (11 task orders, $54 million), the $49 million Quality Assurance Seeding IDIQ (third-party validation and geophysical classification services), and a $1.136 billion SEER Chemical, Environmental, and Munitions Contract. Across these vehicles, Tetra TECH EC issued 52 task orders totaling nearly $191 million in combined potential value, establishing these IDIQs as the backbone of its recent federal business.

Customer concentration is extreme and single-agency-dominated: the Department of the Army Corps of Engineers Engineering Support Center Huntsville alone accounts for 51 of 83 awards (61% of the award count) and $6.9 billion of the $7.21 billion combined potential value (96% of dollars). The next four customer agencies—Engineering District Baltimore, the parent Engineering and Support Center, Engineering District Japan, and the Department of the Army proper—collectively account for 22 awards and $306.3 million, meaning Tetra TECH EC's federal footprint is functionally an extension of Army Corps work under three IDIQ vehicles. This concentration reflects the Corps' role as executive agent for DOD environmental remediation and AFFF remediation across all services.

Capability framing is concrete and specific. The company executes AFFF removal, disposal, and replacement at Department of Defense installations domestically and internationally, with recent delivery orders including a $4.06 million AFFF replacement task order at Army installations in Austin, Texas (awarded September 2025), a $20.46 million military munitions elimination (MEC) and munitions potentially presenting an explosive hazard (MPPEH) removal action and construction support order at U.S. Army Garrison Kwajalein Atoll in the Marshall Islands (September 2024), a $7.35 million AFFF replacement order for Marine Corps Installations Japan (September 2024), and a $4.98 million removal action and construction support order at Kubasaki High School in Okinawa, Japan (September 2025). The company also performs remedial investigation and feasibility study work for military munitions response, as shown by a $4.58 million compliance cleanup and munitions response delivery order at an Army National Guard site in Dillon, Montana (September 2023), and a $2.82 million munitions and explosives of concern investigation for the Nashua River Former Fort Devens in Massachusetts (May 2022). Work is performed domestically and at overseas locations including Japan, Germany, Italy, and the Marshall Islands, with places of performance spanning Hawaii, Arizona, California, Connecticut, Florida, Georgia, Texas, and multiple international sites.

Tetra TECH EC subcontracts to specialized environmental firms on complex projects. Named subcontractors across the AFFF and environmental remediation work include Capitol Environmental Services Inc. (waste hauling, transportation, and disposal), Fire Sprinkler Service LLC (foam replacement materials, sprinkler installation, and site safety support), National Foam Inc. (F3 foam supply and shipping logistics), Environmental Science Corporation, Pamcore, Aero TEC Laboratories, Insight Environmental Engineering & Construction (a minority-owned small disadvantaged business performing sprinkler installation labor), and United Rentals for equipment rental. These relationships reflect Tetra TECH EC's role as systems integrator and project manager rather than direct executor of all field work.

Activity has been uneven. Awards-per-year counts stand at three in 2022, ten in 2023, seven in 2024, and nine in 2025, with only one award recorded to date in 2026. Thirteen awards totaling $33.5 million in combined potential value reach ultimate completion within the next twenty-four months, representing recompete exposure on a subset of the company's portfolio, particularly on smaller task orders. By contrast, the parent $800 million AFFF MATOC and $500 million IRES2 vehicles do not expire until February 2029 and February 2028 respectively, securing Tetra TECH EC's continued ordering authority under those vehicles for the medium term.

The $6.9 billion in combined potential value held under Army Corps vehicles vastly exceeds the $464 million in obligations across all awards to date (6% of potential value), indicating the company's ceiling capacity far outpaces current spend and reflects the size ceiling on the AFFF MATOC and IRES2 bases.