Supply Chain Map
TTEKCIK 831641

TETRA TECH INC

EDGAR filings
Customers
22
15 federal agencies, 7 prime contractors
Suppliers
15
15 federal subcontractors
Largest customer
—
No % disclosed
Named-customer revenue
—
No estimate available
Federal obligations
$458.2M
FY2026 · USAspending.gov
SuppliersCustomersFire Sprinkler Service LLCsubcontract · $2.3MFire Sprinkler Service LLC (subcontractor): $2.3M in FY2025 across 6 awardsCapitol Environmental Servicsubcontract · $1.8MCapitol Environmental Services INC (subcontractor): $1.8M in FY2025 across 2 awardsGEL Laboratories LLCsubcontract · $1.1MGEL Laboratories LLC (subcontractor): $1.1M in FY2025 across 7 awardsDinetahdoo Cultural Resourcesubcontract · $981.2KDinetahdoo Cultural Resources LLC (subcontractor): $981.2K in FY2025 across 1 awardsSchnabel Engineering LLCsubcontract · $935.0KSchnabel Engineering LLC (subcontractor): $935.0K in FY2025 across 1 awardsAK Government Solutions, INCsubcontract · $927.1KAK Government Solutions, INC (subcontractor): $927.1K in FY2025 across 1 awardsSkymantics, LLCsubcontract · $860.3KSkymantics, LLC (subcontractor): $860.3K in FY2025 across 1 awardsRiley Engineering, LLCsubcontract · $791.4KRiley Engineering, LLC (subcontractor): $791.4K in FY2025 across 4 awards+7 more · $4.6M7 smaller links, listed in the table belowTransportationfederal · $127.3MDepartment of Transportation (federal): $127.3M in FY2026 across 77 awardsDefensefederal · $125.3MDepartment of Defense (federal): $125.3M in FY2026 across 195 awardsEnvironmental Protection Agefederal · $66.9MEnvironmental Protection Agency (federal): $66.9M in FY2026 across 324 awardsStatefederal · $60.0MDepartment of State (federal): $60.0M in FY2026 across 23 awardsEnergyfederal · $25.3MDepartment of Energy (federal): $25.3M in FY2026 across 11 awardsNational Aeronautics and Spafederal · $10.5MNational Aeronautics and Space Administration (federal): $10.5M in FY2026 across 31 awardsInteriorfederal · $8.9MDepartment of the Interior (federal): $8.9M in FY2026 across 20 awardsMillennium Challenge Corporafederal · $6.9MMillennium Challenge Corporation (federal): $6.9M in FY2026 across 10 awards+14 more · $40.8M14 smaller links, listed in the table belowTTEK
Band height is the estimated dollar value: the disclosed share × the discloser's revenue for that period (latest full year where available) or federal dollars obligated. Each side is scaled on its own; dashed outlines are named without a figure. Click a band to open its source.

Federal contracts 15

Agencies that awarded contracts to this company, from USAspending.gov. Dollars are obligated amounts as reported, not estimates; $460.3M in the latest fiscal year shown per agency.

Federal subcontractors 15

Companies this contractor subcontracted work to on federal prime contracts. From USAspending.gov subaward reports; amounts are as reported by the prime contractor, latest report per subaward, $500K+ a year.

Federal subcontracts received 7

Prime contractors that subcontracted federal work to this company. From USAspending.gov subaward reports; amounts are as reported by the prime contractor, latest report per subaward, $500K+ a year.

Named as competitors

Companies this filer names as competitors.

Alerts are coming

Get an email when TTEK's disclosed suppliers or customers change. Join the list and we'll tell you when alerts launch. One email, no spam.

We store only your email, the page you signed up from and the time. Privacy