TETRA TECH, INC. is a South Dakota corporation, registered on May 13, 2002. It is based at 3475 E FOOTHILL BLVD, PASADENA, CA, 91107. The company is currently listed as active on the South Dakota register, is registered under company number FB026244 and carries EIN 954148514. Its E-Verify enrollment reports a workforce of 100 to 499 employees, hiring at 22 sites across 14 states. Public records for the company include 1 SoS registration, 1 UCC lien, 5 permits, 70 licenses, 98 federal contracts, 113 H-1B filings, 3 E-Verify records, 4 USDOT records, 25 Form 5500 filings and 1 SEC filing. Every fact here is republished from an official public register and traces back to a primary source document.
| Legal entity name | TETRA TECH, INC. |
|---|---|
| Principal address | 3475 E FOOTHILL BLVDPASADENA91107CAUnited States |
| Registration state | South Dakota |
| Status | Active |
| Formed in | Delaware (foreign registration) |
| Home company | TETRA TECH, INC. |
| Registered | 13 May 2002 (over 24 years ago) |
| Shareholders | RICHARD A LEMMON, ownerERIC RIBARY, owner |
| Entity type |
| Corporation |
| Standing | compliant |
|---|
| Company number | FB026244 |
|---|
| EIN | 954148514 |
|---|
| LEI | 549300UJ1LP7JGJC5P32 |
|---|
| Employees (modeled) | ≈11,600 employees2024 |
|---|
| Workforce size | 100 to 499 employees · updated 13 May 2026 |
|---|
| Hiring sites | 22 sites across 14 states |
|---|
| H-1B filings | 113 LCA filings, FY 2009–2025 |
|---|
| USDOT carrier | USDOT 616131 (+1 more) · 6 power units · 13 drivers · Interstate |
|---|
| Registered agent | C T CORPORATION SYSTEM |
|---|
| Source registry | South Dakota Secretary of State · updated 15 June 2026 |
|---|
| Public records | 1 SoS registration · 1 UCC lien on file |
|---|
Direct email, phone, website, address and the contact person are unlocked with a Pro subscription. Create an account to reveal them.
| Est. revenue (modeled) | $2.8B2024 |
|---|---|
| Federal contractor | Yes · 98 federal recipient records (SAM) |
| State | Business name | Filed | Registered agent | Officers | Status | |
|---|---|---|---|---|---|---|
| South DakotaTHIS | TETRA TECH, INC. | 2002-05-13 | C T CORPORATION SYSTEM | — | Active | |
Filing ID FB026244 Jurisdiction Foreign · CorporationFormed in Delaware Principal address 3475 E FOOTHILL BLVD, PASADENA, CA, 91107 Registered agent C T CORPORATION SYSTEM319 S COTEAU ST, PIERRE, SD, 57501-3187 Officers Not reported | ||||||
| Arizona | TETRA TECH, INC. | 1998-06-24 | C T CORPORATION SYSTEM | Preston HopsonOfficerRoger R. ArgusDirector, Officer13 more | Active | |
| District of Columbia | TETRA TECH INC. | 1988-03-30 | C T CORPORATION SYSTEM | Olivier H JeannotOwnerGary R. BirkenbeuelOwner15 more | Active | |
| Delaware | TETRA TECH, INC. | 1988-02-04 | THE CORPORATION TRUST COMPANY | — | Unknown | |
| Hawaii | TETRA TECH, INC. | 1995-01-17 | C T CORPORATION SYSTEM | BATRACK, DAN LDirectorCARTER, BRIAN NOfficer12 more | Active | |
| Illinois | TETRA TECH, INC. | 1994-08-11 | C T CORPORATION SYSTEM | — | Inactive | |
| Indiana | TETRA TECH, INC. | 2001-10-05 | C T CORPORATION SYSTEM | Gary R. BirkenbeuelOfficerChristiana ObiayaOfficer6 more | Active | |
| Kentucky | TETRA TECH, INC. | 1999-03-31 | C T CORPORATION SYSTEM | M. SUSAN HARDWICKDirectorWilliam R. BrownlieOfficer13 more | Active | |
| Maine | TETRA TECH, INC. | 2007-12-28 | C T CORPORATION SYSTEM | — | Active | |
| Michigan | TETRA TECH, INC. | 1999-06-07 | THE CORPORATION COMPANY | — | Active | |
| Missouri | TETRA TECH, INC. | 1992-06-29 | C T CORPORATION SYSTEM | M. SUSAN HARDWICKDirectorPRESTON HOPSONOfficer9 more | Active | |
| Montana | TETRA TECH, INC. | 1998-12-02 | C T CORPORATION SYSTEM | RICHARD A LEMMONOfficerSTEVEN M BURDICKOfficer3 more | Active | |
| Nebraska | TETRA TECH, INC. | 1998-02-09 | C T CORPORATION SYSTEM | PATRICK C HADENDirectorDAN L BATRACKDirector, Officer32 more | Active | |
| Rhode Island | Tetra Tech, Inc. | 1999-04-27 | CT CORPORATION SYSTEM | RICHARD A. LEMMONOfficerROGER R. ARGUSOfficer, Director14 more | Active | |
| Texas | TETRA TECH, INC. | 1992-07-31 | CT CORPORATION SYSTEM | LESLIE L SHOEMAKEROfficerGARY R BIRKENBEUELDirector22 more | Active | |
| Utah | TETRA TECH, INC. | 1988-10-18 | C T CORPORATION SYSTEM | JIM WUOfficerKRISTEN M. VOLPIDirector21 more | Active | |
| Virginia | Tetra Tech, Inc. | 1988-04-05 | C T CORPORATION SYSTEM | Kirsten M. VolpiOfficerWilliam R. BrownlieOfficer13 more | Active | |
| Vermont | TETRA TECH, INC. | 2005-05-23 | C T CORPORATION SYSTEM | Richard A. LemmonOfficerDan L. BatrackOfficer, Director12 more | Active | |
Companies and people linked to TETRA TECH, INC. in the state registers through shared officers, a shared registered agent, shared filing contacts or a shared address. Service companies file for many unrelated businesses — a shared agent, address or contact alone does not prove affiliation.
company person group former role
| State | Permit | Issued | Type | Location | Status | |
|---|---|---|---|---|---|---|
| Texas | 1807261130_117270871-001 | 2018-07-26 | — | 12655 N CENTRAL EXPY, 307, Dallas TX, 12655 | Final CO Issued | |
| Texas | 1705301005_105943630-002 | 2017-05-30 | — | 12655 N CENTRAL EXPY, 305, Dallas TX, 12655 | Final CO Issued | |
| Texas | 19541485140 | 2014-02-13 | — | N CAPITAL OF TEXAS HWY STE 2310 | Unknown | |
| Hawaii | — | — | — | 92-200 FARRINGTON HWY Kapolei 96707 | Permit application closed | |
| Texas | 19541485140 | 2014-02-13 | — | 8911 N CAPITAL OF TEXAS HWY STE 2310 | Unknown | |
| State | License / ID | Type | Issued | Status | |
|---|---|---|---|---|---|
| Connecticut | — | — | 2026-06-18 | ACTIVE | |
| California | BLCON25-1050 | Class A - General Engineering Contractor | 2025-10-02 | Active/Paid New | |
| California | GBL-001671 | General Business License | 2025-09-03 | Issued | |
| California | — | — | 2025-07-01 | Unknown | |
| Illinois | 184001919-0002 | DESIGN FIRM | 2025-03-11 | ACTIVE | |
| California | BL18-2140 | LEGACY BUSINESS LICENSE - CONTRACTOR | 2024-10-21 | Active/Paid Renewal | |
| New Mexico | BRC-2002-280483 | Business Registration Renewal | 2024-08-01 | Archived Legacy - PLN | |
| New Mexico | BR-2024-030147 | Business Registration Renewal | 2024-08-01 | Converted Record | |
| New Mexico | BR-2023-034113 | Business Registration Renewal | 2023-08-01 | Converted Record | |
| New Mexico | BR-2022-032363 | Business Registration Renewal | 2022-08-01 | Converted Record | |
| Case | Filed | Job title | Wage | Worksite | Status | |
|---|---|---|---|---|---|---|
| I-200-25225-240492 | 2025-08-13 | Engineering Project Manager-Landfill Gas Design | $125,000/yr | Fremont | Certified | |
| I-200-25212-212158 | 2025-07-31 | Civil Process Engineer | $100,000/yr | Kansas City | Certified | |
| I-200-25181-139269 | 2025-06-30 | Civil Water/Wastewater Engineer | $131,000/yr | Austin | Certified | |
| I-203-24228-269306 | 2024-08-15 | Ocean Science Modeler | $125,000/yr | South Kingstown | Certified | |
| I-200-24226-263162 | 2024-08-13 | Water Resources/Stormwater Project Engineer | $105,000/yr | Plano | Certified | |
| I-200-24185-173564 | 2024-07-03 | Global IT Program Manager - North America | $186,730/yr | Tomball | Certified | |
| I-200-24184-167109 | 2024-07-02 | Civil Water/Wastewater Engineer | $125,000/yr | Austin | Certified | |
| I-203-22266-491126 | 2022-09-23 | Environmental Scientist | $76,773/yr | Golden | Certified | |
| I-200-21253-577432 | 2021-09-10 | Energy Sector Associate | $69,000/yr | Arlington | Certified | |
| I-200-21242-553848 | 2021-08-30 | Software Engineer | $68/hr | Arlington | Certified | |
Showing the latest 100 of 113 records.
| State | Workforce | Hiring sites | Enrolled | Industry | Status | |
|---|---|---|---|---|---|---|
| 36 states | 1,000 to 2,499 | 112 | 10/24/2008 | PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES (54) | Open | |
| 14 states | 100 to 499 | 22 | 2/18/2010 | PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES (54) | Open | |
| 51 states | 10,000 and over | 1,152 | 6/9/2016 | PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES (54) | Open | |
Employee-benefit plan filings by TETRA TECH, INC. with the Department of Labor. Employee and revenue figures are modeled estimates derived from retirement-plan participant counts and industry ratios — not official headcount or reported revenue.
| Employees (modeled) | ≈11,600 · plan year 2024 |
|---|---|
| Est. annual revenue (modeled) | $2.8B |
| Retirement plan assets | $2.2B |
| Benefit plans | 401(k) plan on file |
| Filing history | 26 plan years filed, 1999–2024 |
| Sponsor EIN | 95-4148514 |
| Plan year | Employees (est.) | Participants | Plan assets | Revenue (est.) | 401(k) | |
|---|---|---|---|---|---|---|
| 2024 | ≈11,600 | 15,680 (10,454 active) | $2.2B | $2.8B | 401(k) | |
| 2023 | ≈13,700 | 14,697 (12,307 active) | $2B | $3.1B | 401(k) | |
| 2022 | ≈11,500 | 13,927 (10,360 active) | $1.5B | $2.6B | 401(k) | |
| 2021 | ≈11,400 | 13,725 (10,218 active) | $1.4B | $2.5B | 401(k) | |
| 2020 | ≈9,810 | 11,932 (8,833 active) | $1.6B | $2.3B | 401(k) | |
| 2019 | ≈9,810 | 11,932 (8,833 active) | $1.3B | $2.1B | 401(k) | |
| 2018 | ≈9,670 | 10,747 (8,701 active) | $1.2B | $2B | 401(k) | |
| 2017 | ≈8,610 | 11,276 (7,750 active) | $1.1B | $1.8B | 401(k) | |
| 2016 | ≈9,390 | 11,341 (8,447 active) | $1B | $1.9B | 401(k) | |
| 2015 | ≈9,380 | 10,721 (8,446 active) | $888.8M | $1.8B | 401(k) | |
Matched Form 5500 filing records:
| Plan | Plan year | Participants | EIN | |
|---|---|---|---|---|
| TETRA TECH, INC. AND SUBSIDIARIES RETIREMENT PLAN | — | — | — | |
| TETRA TECH, INC. AND SUBSIDIARIES RETIREMENT PLAN | — | — | — | |
| TETRA TECH EAST TENNESSEE TECHNOLOGY PARK RETIREMENT SAVINGS PLAN | — | — | — | |
| TETRA TECH EAST TENNESSEE TECHNOLOGY PARK RETIREMENT SAVINGS PLAN | — | — | — | |
| TETRA TECH, INC. AND SUBSIDIARIES RETIREMENT PLAN | — | — | — | |
| TETRA TECH, INC. AND SUBSIDIARIES RETIREMENT PLAN | — | — | — | |
| TETRA TECH, INC. PUERTO RICO RETIREMENT PLAN | — | — | — | |
| TETRA TECH, INC. AND SUBSIDIARIES RETIREMENT PLAN | — | — | — | |
| TETRA TECH, INC. AND SUBSIDIARIES RETIREMENT PLAN | — | — | — | |
| TETRA TECH, INC. AND SUBSIDIARIES RETIREMENT PLAN | — | — | — | |
| CIK / File | Filed | Form | Detail | |
|---|---|---|---|---|
| 831641 | — | — | — | |
Federal court records load when you reach this section.
Companies adjacent to TETRA TECH, INC. in the South Dakota Secretary of State register, in alphabetical order.
161 companies are registered at 3475 E FOOTHILL BLVD, PASADENA — shared registered-office and agent addresses are common; a shared address alone does not link businesses.
Netstate aggregates public records from federal, state and municipal sources; records are matched to this company by its registered legal names. Latest source snapshot 2026-07-29. Document getpalm-companies/8933-9599-5514.