Tetra Tech, Inc.

Tetra Tech, Inc.'s Environmental and Infrastructure Division, doing business as Tetra Tech Em Inc., delivers environmental site remediation, hazardous waste assessment, emergency response, and Superfund technical support services to the Environmental Protection Agency and U.S. Army Corps of Engineers as a large prime contractor competing full-and-open without set-asides. The division is a wholly owned child entity of Tetra Tech, Inc., a globally recognized Pasadena, California–headquartered consulting and engineering firm.

Tetra Tech Em Inc. operates almost exclusively as a prime contractor—574 awards in the source data carry no subcontract tag—delivering environmental assessment, site investigation, groundwater treatment, risk evaluation, and remedial action planning at contaminated Superfund sites across EPA Region 7 (Kansas, Missouri, Nebraska, Iowa) and secondary work in EPA Regions 2 and 4 and with the Army Corps of Engineers. Representative work includes a $1.8 million sampling and analysis support delivery order for Cherokee County mining sites under EPA Region 7's START VI contract (August 2025); a $2.74 million residential sampling, access obtainment, and database update order for Southwest Jefferson County mining site (July 2022); a $2.65 million RCRA remedial facility investigation addendum at McConnell Air Force Base, Wichita, Kansas, with specialized subcontractors Flexible Liner Underground Technologies, Environmental Works Inc., and Pace Analytical Services for drilling, sampling, and laboratory analysis (September 2021); and a $2.5 million architect-engineer delivery order under the Army Corps' $225 million Kansas City District Unrestricted A-E MATOC for EPA Region 2 remedial investigations and feasibility studies at Historic Potteries Superfund Site in Trenton, New Jersey (September 2023).

Customer concentration centers on EPA Region 7, which anchors 515 of 574 awards (95% of award count) valued at $315.9 million combined potential value—approximately 60% of the division's total federal footprint. The Department of the Army Corps of Engineers Kansas City District ranks second by potential value ($450 million across 4 awards, all parent IDVs) but represents downstream administrative authority for Superfund Technical Assessment and Response Team (START) contracts flowing to EPA Region 7 operations. The Army Corps of Engineers St. Louis District adds $49.5 million across 2 awards (the $225 million Kansas City A-E MATOC and a separate $49.5 million Architect-Engineer MATOC awarded March 2025). EPA Region 2 and the Department of Commerce National Oceanic and Atmospheric Administration contribute $6.9 million and $3.1 million respectively, representing satellite work outside the Midwest core. The two customer rankings diverge sharply: EPA Region 7 dominates both volume and dollars, while the Army Corps' parent IDVs appear small in task-order count but carry multi-hundred-million-dollar ceilings.

Tetra Tech Em Inc. holds or participates under multiple parent vehicles. The EPA Region 7 Superfund Technical Assessment & Response Team VI (START VI)—a $94.4 million single-award IDV awarded July 2025 and extending through June 30, 2028—has generated 51 task orders in the source data. The predecessor Superfund Technical Assessment Response Team V (START V)—a $73.3 million vehicle—carries 253 task orders, the largest volume under any single parent. Both are time-and-materials or firm fixed-price delivery-order vehicles for environmental assessment, emergency response, site investigations, groundwater treatment, risk assessments, hazardous waste cleanup, and technical documentation. The Army Corps' $225 million Kansas City Unrestricted Architect-Engineer MATOC (multiple award, cost-plus-fixed-fee, awarded July 2024, extending to July 2029) supports USACE Northwest Division and EPA Region 2, with at least two task orders visible ($2.5 million minimum guarantee and $2.5 million architect-engineer minimum guarantee). Tetra Tech Em Inc. also participates in smaller Idaho MATOC and other regional architect-engineer vehicles.

The division's activity has grown moderately over five years—54 awards in 2022, 29 in 2023, 42 in 2024, 56 in 2025, and 11 through early July 2026—reflecting task-order volume under large standing vehicles rather than new prime contract wins. Combined potential value across all 574 awards is $830.7 million; combined dollars obligated is only $97.6 million (12% of potential value), indicating these are predominantly ceiling contracts with work executed against task orders. Recompete exposure in the next twenty-four months totals 47 awards valued at $21.1 million—modest in absolute terms but concentrated in the START V vehicle as the division transitions fully to START VI.

Service Contract Inventory data shows SCI-reportable invoicing (federal service contracts above $150,000 threshold) of $11.7 million across FY2022–FY2024: $2.3 million (FY2022, 13.5 FTEs), $4.4 million (FY2023, 19.2 FTEs), and $4.9 million (FY2024, 27.0 FTEs). SCI captures a strict subset of Tetra Tech Em Inc.'s federal services revenue and excludes goods, classified work, and sub-awards. Across SCI-reportable prime contracts, median government-paid hourly rates run approximately $90/hr, with senior labor through $125/hr (90th percentile) and junior labor around $75/hr (10th percentile). The division leverages subcontractors for specialized services—drilling, soil sampling, laboratory analysis—averaging 4% sub-hours share across SCI prime contracts and naming 19 distinct subcontractors, including Flexible Liner Underground Technologies, Environmental Works Inc., Pace Analytical Services, Northwind Engineering (EDWOSB/WOSB/HUBZone), and Professional Environmental Engineers (8(a)/HUBZone).

Tetra Tech Em Inc. competes full-and-open on all 574 awards; no set-asides appear in the source data. The division operates as a captive delivery arm of its parent, Tetra Tech, Inc., a large federal contractor with $2.5 billion+ in aggregate federal IDV value across the Department of Defense, NASA, Department of Energy, and other agencies. Tetra Tech Em Inc.'s EPA Superfund and Army Corps environmental remediation footprint—hundreds of millions of dollars in current vehicles and a sustained multi-year task-order cadence—reflects the parent's established position as a primary environmental services contractor for federal contaminated-site cleanup, groundwater remediation, and emergency response operations in the Midwest and beyond.