Tetra Tech, Inc.
Fairfax, VA
- UEI
- X38LAAB5HB64
- CAGE
- 1P0H7
- Primary NAICS
- 541620 Environmental Consulting Services
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Other NAICS codes in SAM.gov
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- 541310 Architectural Services
- 541330 Engineering Services
- 541370 Surveying and Mapping (except Geophysical) Services
- 541512 Computer Systems Design Services
- 541519 Other Computer Related Services
- 541611 Administrative Management and General Management Consulting Services
- 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- 562910 Remediation Services
Show all 9
- Corporate family
-
-
Parent
Pasadena, CA
LMRMKLLL3LG5
-
Parent
Pasadena, CA
LMRMKLLL3LG5
- SAM.gov registration date
- Physical address
- 10306 Eaton Pl #340, Fairfax, VA 22030, USA
- Website
- tetratech.com
- Founded
- 1966
- Employees
- 10K-50K
- Estimated annual revenue
- $1B-$10B
- Industry
-
- Industrials
- Capital Goods
- Construction & Engineering
- Civil Engineering
- SIC code
- 87 Engineering & Management Services
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | -$992 |
| FY2026 | $1,513,664 |
| FY2025 | $2,224,575 |
| FY2024 | $3,228,201 |
| FY2023 | $5,300,618 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Environmental Protection Agency | $1,497,239 | |
| 2 | Department of the Interior | $15,433 |
Contract vehicles
No active vehicles.
Contract awards
Latest 5 listed here. See the rest on GovTribe.
Grant subawards
| Prime recipient | Prime award | Amount | Awarded |
|---|---|---|---|
| University Of California San Diego | NA21NOS0120088 | $160,000 | |
| Arkansas Natural Resources Commission | 02F21802 | $44,970 | |
| Chesapeake Bay Trust | 96374201 | $75,000 |
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| Horsley & Witten Inc. | Sandwich, MA | 541620 Environmental Consulting Services |
| Corporate Headquarters | Rockville, MD | 541620 Environmental Consulting Services |
| The Cadmus Group LLC | Arlington, VA | 541620 Environmental Consulting Services |
| GCI | Boca Raton, FL | 541330 Engineering Services |
| PG Environmental, LLC | — | 541620 Environmental Consulting Services |
About the company
Tetra Tech, Inc., a large for-profit environmental and engineering consulting firm headquartered in Pasadena, California, operates as a prime contractor across federal agencies without small business designations, delivering water quality assessment, ecological research, environmental compliance support, and geospatial services. The vendor competes in full-and-open procurements and does not pursue set-aside work. Tetra Tech operates through a Fairfax, Virginia division that serves as the primary operational hub for federal work, with subordinate performance locations across the continental United States and Alaska supporting EPA, Army Corps of Engineers, Department of the Army, and NOAA.
Customer concentration is acute and anchored to environmental work. The EPA accounts for approximately 60 percent of Tetra Tech's recent prime footprint by dollar volume, split between the EPA Office for Water (227 awards, $601.8 million combined potential value) and the EPA Office of Research and Development (76 awards, $89 million combined potential value). The Army Corps of Engineers Engineering District Mobile ranks second (98 awards, $364.2 million combined potential value). Together, these three customers account for 77 percent of combined potential value across 401 awards. The EPA's Office for Water and Office of Research and Development dominate by both award count and dollars, reflecting Tetra Tech's positioning as a lead technical provider for federal water quality standards development, ecological assessment, contaminant and pathogen risk characterization, and watershed management.
Tetra Tech's capability portfolio centers on water quality and environmental assessment services delivered through delivery orders under single-award and multiple-award indefinite delivery contracts. Representative work includes a $25 million single-award IDIQ (awarded April 2026, extending through April 2031) with the EPA Office of Water for assessing ecological and human health risks from contaminants and microbial pathogens in surface waters, under which the vendor issued two orders in 2026: a $779,597 cost-plus-fixed-fee delivery order for National Pollutant Discharge Elimination System water quality technical support and a $1,091,134 cost-plus-fixed-fee delivery order for technical support in water quality standards rulemakings. Tetra Tech also holds a $100.5 million single-award IDIQ with the EPA Office of Research and Development (awarded October 2022, extending through September 2027) for ecological and global change assessment research, under which the vendor has issued orders for District of Columbia bacteria TMDL modeling ($819,074.90), regional monitoring networks maintenance ($364,807.02), National Coastal Condition Assessment quality assurance ($269,788), harmful algal bloom vulnerability assessment for Alaska public water systems ($373,279.89), and PFAS spatial analysis and data curation. Most recently, Tetra Tech received a $49 million multiple-award indefinite delivery contract from NOAA (awarded August 2026, extending through August 2031) to provide coastal geospatial services in support of the Office for Coastal Management. Across SCI-reportable service contracts, Tetra Tech self-performs the majority of delivery; subcontractors account for an average of 4 percent of total contractor hours, with 18 named subcontractors reported across prime contracts.
Activity trajectory shows decline over the past five years. Awards per year fell from 25 (2023) to 14 (2024) to 10 (2025) to 8 (2026), with one award recorded for 2027. Combined potential value across all 1,081 awards totals $1.45 billion, with $400.1 million obligated (28 percent of combined potential value). SCI-reported invoicing declined sharply from $6 million in FY2022 across 19.8 FTEs to $2.2 million in FY2024 across 10.1 FTEs and further to $1.6 million in FY2025 across 8.0 FTEs—a downward trajectory driven by task order value reductions and FTE scaling. Government-paid hourly rates on EPA-related contracts range from $89.94 to $298.88 per hour, with a median of $154.29 per hour. Eight awards with combined potential value of $8.4 million face completion within the next twenty-four months and expose the vendor to recompete risk in water quality standards, ecological assessment, and contaminant risk domains.
Tetra Tech operates 100 percent as a prime contractor on reported awards (1,078 prime awards, 3 sub awards in grant work), reflecting its status as a large established firm anchoring delivery through in-house capability rather than subcontractor scaling. The vendor holds principal contract positions under the EPA Assessment and Watershed Protection II IDIQ (EPC08004, 112 task orders, $51.7 million combined potential value) and predecessor vehicles, positioning it as a sustained incumbent across EPA water quality programs. Recent federal grant sub-recipient work includes data management and communications system support for the Southern California Coastal Ocean Observing System through a University of California San Diego prime (awarded March 2026), Arkansas Nutrient Reduction Strategy updates through Arkansas Natural Resources Commission (awarded October 2025), and stream health indicator development through Chesapeake Bay Trust (awarded January 2025).
Quick answers
Is Tetra Tech, Inc. registered in SAM.gov?
Yes. Tetra Tech, Inc.'s SAM.gov registration is active through January 19, 2027.
Which contract vehicles does Tetra Tech, Inc. hold?
Tetra Tech, Inc. holds a place on 4 federal contract vehicles, including ATSDR Public Health Assessment Activities, EPA Assessment and Watershed Protection II and USACE SLANT A-E Services 2016-2021.
How much has Tetra Tech, Inc. received in federal contracts?
Federal contracts obligated $2,224,575 to Tetra Tech, Inc. in fiscal year 2025 and $12,266,067 in fiscal years 2023 through 2027.
How does Tetra Tech, Inc. rank among federal contractors?
Tetra Tech, Inc. ranked #1 in NAICS 54162, #6 in PSC B516 and #9 at the Environmental Protection Agency in FY2025.
What is Tetra Tech, Inc.'s most recent federal award?
Tetra Tech, Inc.'s most recent federal contract award is R499 - national lakes assessment 2027: plankton identification (68HERW26F0193), from Environmental Protection Agency, on February 1, 2027.
On GovTribe
See Tetra Tech, Inc.'s full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
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