Tetra Tech, Inc.

Tetra Tech, Inc. Division—operating as Tetra Tech Em Inc.—is a large, full-and-open environmental consulting and remediation firm delivering site assessment, emergency response, hazardous waste cleanup, and technical documentation services as a prime contractor to the U.S. Environmental Protection Agency and Army Corps of Engineers, with 575 federal awards spanning $831.2 million in combined potential value concentrated heavily in EPA Region 7 Superfund operations.

The Environmental and Infrastructure Division, which conducts business as Tetra Tech Em Inc., is a wholly owned subsidiary of Tetra Tech, Inc., the parent corporation headquartered in Pasadena, California. The division operates as a large federal contractor competing full-and-open without set-asides across environmental consulting services (308 awards) and remediation services (228 awards), with geographic performance concentrated in EPA Region 7 (Kansas, Missouri, Nebraska, Iowa) and secondary activity spanning EPA Regions 2, 4, and 9. On federal services contracts captured in the Service Contract Inventory, the division reported $17.1 million in invoiced revenue across FY2022–FY2025, with FY2025 posting $5.4 million across 26.6 FTEs and median government-paid rates running around $90/hr, with senior labor pricing through $126/hr on the 90th percentile.

Customer concentration is extreme. EPA Region 7 anchors 516 of 575 total awards (95% of award count) valued at $316.4 million combined potential value, constituting the dominant revenue source and operational focus. The Army Corps of Engineers Kansas City District contributes four awards valued at $450 million combined potential value, representing the second-largest customer by dollar magnitude but not by order frequency. EPA Region 2 follows with five awards ($6.9 million), the Department of Commerce National Oceanic and Atmospheric Administration with 14 awards ($3.1 million), and EPA Region 4 with seven awards ($391 thousand). This concentration presents strategic risk: EPA Region 7 account volatility directly impacts the division's revenue trajectory.

The division holds position on three active parent indefinite delivery vehicles: the $94.4 million EPA Region 7 Superfund Technical Assessment & Response Team VI contract (awarded July 1, 2025, extending through June 30, 2028), under which 51 delivery orders have been issued since award with individual ceilings ranging from $16,734 to $2.7 million; the $225 million USACE Kansas City District Unrestricted Architect-Engineer MATOC (awarded July 31, 2024, extending through July 31, 2029), supporting environmental remediation and Superfund technical services across EPA Region 2 and USACE Northwest Division; and a $49.5 million St. Louis District MATOC awarded March 14, 2025, with completion targeted for September 13, 2030. These vehicles enable the division to field task orders for remedial investigations, feasibility studies, risk assessments, site investigations, groundwater treatment design, and emergency response support at contaminated sites.

Recent representative work includes a $2.7 million firm-fixed-price delivery order awarded July 22, 2022, for Southwest Jefferson County Mining Site access, sampling, and technical support (EPA Region 7); a $1.8 million time-and-materials delivery order awarded August 25, 2025, for sampling and analysis support at Cherokee County mining sites (EPA Region 7); a $1.9 million cost-plus-fixed-fee delivery order issued September 23, 2025, for remedial investigation and feasibility study services at Historic Potteries Superfund Site Operable Unit 2 in Trenton, New Jersey (EPA Region 2); and a $95,145 delivery order issued September 11, 2026, for environmental remediation work at Big River Mine Tailings in Bonne Terre, Missouri (EPA Region 7). Work performed spans time-and-materials, labor-hour, and firm-fixed-price pricing structures.

Activity has grown from 54 awards in 2022 to a recent pace of 56 awards in 2025, with 12 awards recorded year-to-date in 2026. The division generated 253 task orders under the predecessor START V vehicle and continues substantial task order volume under START VI. Within 24 months, 36 awards carrying $17.9 million combined potential value face ultimate completion, creating recompete exposure across multiple Superfund sites.

Across SCI-reportable prime contracts, the division self-performed 97% of contractor hours, with subcontractors contributing roughly 3% of total hours. Named subcontractors appearing in the SCI dataset and recent award summaries include Flexible Liner Underground Technologies, Environmental Works Inc., Pace Analytical Services, Northwind Engineering LLC (an EDWOSB, WOSB, and HUBZone-certified small business providing vehicle leasing and travel support), and Professional Environmental Engineers, Inc. (an 8(a) and HUBZone-certified small disadvantaged business providing labor and direct costs). This subcontracting pattern reflects the division's use of specialized suppliers for drilling, soil sampling, laboratory analysis, and ancillary support services rather than deep prime-sub integration.

The division competes as a prime contractor exclusively within this portfolio; no sub-award activity appears in the source data. Competitive posture is full-and-open on all major vehicles, with no 8(a), HUBZone, SDVOSB, or other set-aside participation. This positioning limits the division's access to small-business-reserved procurements but reflects the parent company's scale and market position as a large environmental services provider to federal agencies.