Tetra Tech

Legal name, DBA and former names

• Tetra Tech, Inc.Source: tetratech.com · As of 2026-10-11

Identifiers (UEI, state registrations)

• SAM UEI LMRMKLLL3LG5 (as shown on the USAspending recipient record) and Texas TBPELS firm no. 3924.Source: usaspending.gov/recipient/9c8bd8f3-f7da-600d-94… · As of 2026-10-11

Offices

• Tetra Tech has 500 offices worldwide.Source: tetratech.com/about · As of 2026-10-11

Ownership type

• Publicly traded company, as described on the firm's own website.Source: tetratech.com · As of 2026-10-11

Employee count or band

• More than 25,000 employees, per the firm's site.Source: tetratech.com/about · As of 2026-10-11

Services and markets

• Tetra Tech provides technical and engineering services in water, environment, and sustainable infrastructure.Source: tetratech.com/about · As of 2026-10-11

Licences (board records)

• Texas TBPELS roster lists TETRA TECH INC (firm no. 3924, type NS, expires 2028-07-31)Source: tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip · As of 2026-10-04

DOT prequalification

• TxDOT Active Precertified Firms lists TETRA TECH, INC. with 17 areas of certification, renewal status JANUARY 25, 2024 ( ACTIVE )Source: dot.state.tx.us/des/precert/precrt12.htm · As of 2026-10-05

Federal awards (contracts)

• USAspending recipient record TETRA TECH, INC. (Pasadena, CA), contract award obligations: FY2021 $751,575,962, FY2022 $842,678,977, FY2023 $1,005,309,834, FY2024 $950,716,035, FY2025 $714,194,574 (award types A to D; obligations as published, including modifications and negative adjustments)Source: usaspending.gov/recipient/9c8bd8f3-f7da-600d-94… · As of 2026-10-11

Public filings

• DOL Form 5500 filings, plan year beginning 2024-10-01, NAICS 541330: TETRA TECH, INC. PUERTO RICO RETIREMENT PLAN (ACK_ID 20260713113751NAL0000101667001, 84 active participants); TETRA TECH, INC. AND SUBSIDIARIES RETIREMENT PLAN (ACK_ID 20260713112350NAL0000113041001, 10,454 active participants)Source: dol.gov/agencies/ebsa/about-ebsa/our-ac… · As of 2026-07-13

Rankings and awards

• Listed in the ENR 2026 Top 500 Design Firms.Source: enr.com/toplists/2026-top-500-design-fi… · As of 2026-10-05

Sources of record

1. https://www.tetratech.com/
2. https://www.usaspending.gov/recipient/9c8bd8f3-f7da-600d-94c4-04e09c223b38-P/latest
3. https://www.enr.com/toplists/2026-top-500-design-firms-1
4. https://www.tetratech.com/about/
5. https://tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
6. https://www.dot.state.tx.us/des/precert/precrt12.htm
7. https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/public-disclosure/foia/form-5500-datasets