States › California › Professional, Scientific, and Technical Services
Tetra Tech, Inc.
OSHA: 5 insp.Injuries: no recordLabor: 3 casesImmigration: 15 LCAContracts: $424M
Across the sources on this site, Tetra Tech, Inc. (Pasadena, California) appears in 5 OSHA inspections, 3 concluded Wage and Hour Division cases, 15 labor condition applications, 3 PERM applications and a federal contract recipient profile.
OSHA opened 5 inspections at Tetra Tech, Inc. sites in California since 2016, issuing 7 citations. Current penalties total $4,350 (initially $4,460), $870 per inspection, below the national figure of $3,754. 3 inspections have at least one contested citation.
The Wage and Hour Division concluded 3 compliance actions involving Tetra Tech, Inc., recording $236 in back wages agreed to pay for 1 employee, under the Fair Labor Standards Act.
It filed 15 labor condition applications with OFLC across fiscal years 2025–2026, covering 15 worker positions. The median offered wage is $107,000 a year against a median prevailing wage of $94,349, in line with the median across all employers for its most common occupation ($91,900). The most common prevailing wage level is Level II (40% of filings).
OFLC records 3 PERM labor certification applications from the employer with a median offered wage of $78,000; the employer reported 41 employees on payroll.
USAspending lists Tetra Tech, Inc. as a parent recipient of $424M in federal contract obligations over the latest twelve months.
OSHA Occupational Safety and Health Administration
Citations may be contested; the status shown reflects the record at the data date. Enforcement data through 14 Sep 2026.
Inspections by year
Compared with industry, state and nation
| Measure | This employer | NAICS 541 | California | US |
|---|---|---|---|---|
| Citations per inspection | 1.4 | 1.3 | 1.9 | 1.9 |
| Current penalty per inspection | $870 | $2,237 | $3,729 | $3,754 |
| Share of inspections with a contested citation | 60% | — | 27% | 8% |
| Share of inspections with final orders on every citation | 40% | — | 59% | 56% |
Inspections with no citations count as "issued" with zero citations. Industry and state figures cover every inspection in the enforcement data since 2016, including employers without a page.
Citations by standard
| Standard | Subject | Citations |
|---|---|---|
| 3203(B) | — | 1 |
| 3203(A)(7)(F) | — | 1 |
| 3395(I) | — | 1 |
| 5144(G)(1)(A)1. | — | 1 |
| 1509(A) | — | 1 |
| 3203(B)(2) | — | 1 |
| 3395(H)(1) | — | 1 |
Standard numbers as the record labels them (29 CFR section; 5(a)(1) is the General Duty Clause). State-plan agencies such as Cal/OSHA cite their own codes, which appear here as recorded. Counted from the first twelve citations of each inspection.
Inspections
| Opened | Type | Scope | Citations | Current penalty | Status | Cited standards |
|---|---|---|---|---|---|---|
| 27 Mar 2025 | Complaint · Health | Partial | 4 | $3,150 | Contested | 3203(B), 3203(A)(7)(F), 3395(I), 5144(G)(1)(A)1. |
| 24 Apr 2019 | Follow-up · Safety | Partial | 0 | — | Case closed | |
| 28 Nov 2018 | Referral · Health | Partial | 1 | $375 | Contested, final order | 1509(A) |
| 30 Oct 2018 | Fatality/catastrophe · Safety | Partial | 2 | $825 | Contested, final order | 3203(B)(2), 3395(H)(1) |
| 11 Mar 2016 | Planned · Safety | Complete | 0 | — | Case closed |
Status is per inspection: "Contested" when any citation has a contest date and "Final order" when every citation has a final order date; "Issued" otherwise. Violation types: S serious, W willful, R repeat. Each date links to the inspection detail on osha.gov.
Injuries OSHA Injury Tracking Application, Form 300A
Establishments submit their own Form 300A summaries; OSHA publishes the data as submitted and does not verify it. Rates are per 100 full-time workers (cases × 200,000 ÷ hours worked). Calendar years 2023–2025.
No Form 300A summary for this employer in California is in the Injury Tracking Application data for 2023, 2024, 2025. Only establishments in covered industries with 20 or more employees (100 or more in some industries) must submit.
Labor Wage and Hour Division
The Wage and Hour Division publishes concluded compliance actions since fiscal year 2005; amounts are back wages the employer agreed to pay and civil money penalties assessed, as recorded at case conclusion. Data through 15 Jun 2026.
Back wages by year of case conclusion
Compared with state and nation
| Measure | This employer | NAICS 541 | California | US |
|---|---|---|---|---|
| Back wages per case | $79 | $27K | $15K | $13K |
| Employees per case | 0.3 | — | 10.8 | 13.1 |
| Back wages per employee found due | $236 | — | $1,389 | $993 |
Acts
| Act | Violations | Back wages |
|---|---|---|
| Fair Labor Standards Act | 3 | $236 |
Cases
| Findings period | Violations | Back wages agreed | Employees | Penalties | Acts | Status |
|---|---|---|---|---|---|---|
| 8 Apr 2025 – 18 Apr 2025 | 2 | $236 | 1 | — | Fair Labor Standards Act | Concluded |
| 1 Apr 2020 – 24 Nov 2020 | 0 | $0 | 0 | — | — | Concluded |
| 3 Nov 2018 – 2 Nov 2020 | 1 | $0 | 0 | — | Fair Labor Standards Act | Concluded |
Every case in the WHD file is concluded; the file does not record whether back wages were subsequently paid. Case IDs: 2004017, 1924828, 1924980.
Immigration Office of Foreign Labor Certification
Employer-specific case information was provided to OFLC by employers who submitted foreign labor certification applications. These are not employer responses to the Bureau of Labor Statistics' survey. Wage levels I–IV are as the employer stated on the application. LCA data through 30 Jun 2026; PERM through 30 Jun 2026.
H-1B labor condition applications
Applications by fiscal year
Prevailing wage levels
Level I 20%Level II 40%Level III 27%Level IV 7%Not stated 7%
| Measure | This employer | SOC 17-2051 | California | US |
|---|---|---|---|---|
| Median offered wage | $107,000 | $91,900 | $156,853 | $122,221 |
| Offered wage, 25th–75th percentile | $99,315–$130,520 | $79,040–$112,000 | — | — |
| Share at Level I or II | 60% | 69% | 42% | 56% |
Wages annualised from the rate and unit on the application (hourly × 2,080). Medians use up to 400 sampled applications per employer. The occupation column is the employer's most common SOC code, Civil Engineers, across all employers.
Top job titles
| Job title | Filings | Median wage |
|---|---|---|
| Civil Engineer | 3 | $87,000 |
| Project Engineer (Chemical Engineer) | 2 | — |
| Engineering Project Manager-Landfill Gas Design | 1 | — |
| Civil Process Engineer | 1 | — |
| Civil Water/Wastewater Engineer | 1 | — |
| Engineer Environmental, Air/Acoustics | 1 | — |
| Water/Wastewater Engineer | 1 | — |
| Electrical Engineer / Project Manager | 1 | — |
| IT Software Developer (Application Database Administrator) | 1 | — |
| Senior Environmental Scientist | 1 | — |
| Senior Water Resources (Hydrology & Hydraulics) Engineer | 1 | — |
| Environmental Engineer | 1 | — |
Occupations (SOC)
| Occupation | Filings | SOC median wage |
|---|---|---|
| Civil Engineers | 7 | $91,900 |
| Environmental Engineers | 3 | $97,344 |
| Chemical Engineers | 2 | $117,500 |
| Robotics Engineers | 1 | $125,000 |
| Software Developers | 1 | $138,494 |
| Industrial Ecologists | 1 | $84,116 |
Worksite states
Texas 5 · Georgia 3 · California 2 · Missouri 1 · Massachusetts 1 · Michigan 1 · Colorado 1 · New York 1
Visa classes: H-1B 14, E-3 Australian 1. Applications are attributed to the employer's state on the form (California); worksites may be elsewhere.
PERM labor certification (green card sponsorship)
Top PERM job titles
| Job title | Applications |
|---|---|
| Civil Water/Wastewater Engineer | 1 |
| Water/Wastewater Engineer | 1 |
| Chemist | 1 |
PERM occupations
| Occupation | Applications |
|---|---|
| Civil Engineers | 2 |
| Chemists | 1 |
Contracts USAspending.gov
USAspending recipient totals are federal contract obligations reported by awarding agencies for the latest twelve months; a recipient profile is a company-level record, not a per-state one. Retrieved 1 Oct 2026.
USAspending lists Tetra Tech, Inc. among the 3,903 largest federal contract recipients. The full award list is on the recipient profile.
Contract obligations by fiscal year
Awarding agencies
| Agency | Obligations, FY2021–2026 | Share of the agencies shown |
|---|---|---|
| Agency for International Development | $1.5B | 33% |
| Department of Defense | $1.3B | 30% |
| Department of Transportation | $545M | 12% |
| Department of State | $499M | 11% |
| Environmental Protection Agency | $466M | 11% |
| Department of Energy | $103M | 2% |
The USAspending name is matched to this employer by normalised company name across all states; the total covers the whole company.
Questions and answers
Has OSHA inspected Tetra Tech, Inc.?
Yes. OSHA records 5 inspections at Tetra Tech, Inc. sites in California since 2016, most recently opened 27 Mar 2025.
Were there penalties, and are they final?
7 citations with current penalties totalling $4,350. 2 inspections have a final order on every citation, 3 have a contested citation and 2 are recorded as issued. Citations may be contested; the status shown reflects the record at the data date.
Did the Labor Department find back wages due from Tetra Tech, Inc.?
The Wage and Hour Division's concluded cases record $236 in back wages agreed to pay across 3 cases, for 1 employee.
Does Tetra Tech, Inc. sponsor H-1B workers, and at what wages?
It filed 15 labor condition applications in fiscal years 2025–2026; 14 were certified. The median offered wage is $107,000 a year; the most common job title is Civil Engineer.
Does Tetra Tech, Inc. sponsor green cards (PERM)?
OFLC records 3 PERM applications in fiscal years 2024–2026, 3 of them certified.
Does Tetra Tech, Inc. hold federal contracts?
USAspending lists it among the largest contract recipients, with $424M obligated over the latest twelve months (recipient level: parent); the largest awarding agency is the Agency for International Development.
Have there been union elections at Tetra Tech, Inc.?
NLRB election results are not loaded on this site at present, so this page cannot say either way. The NLRB publishes recent election results and a case search on nlrb.gov.
Is this the same company as the one I am looking for?
Records are matched by normalised name and state. Subsidiaries, franchisees and other states' entities have their own records. See the methodology for how matching works.
Provenance
OSHA inspections and violations: US Department of Labor enforcement data, data.dol.gov, through 14 Sep 2026, inspections opened since 2016. Injury summaries: OSHA Injury Tracking Application Form 300A data, calendar years 2023, 2024, 2025. Wage and Hour compliance actions: data.dol.gov, concluded cases through 15 Jun 2026. LCA and PERM: OFLC disclosure files, fiscal years 2025–2026 through 30 Jun 2026. Federal contracts: USAspending recipient API, latest twelve months at 1 Oct 2026. NLRB election results are not loaded in this build. US government works, public domain; USAspending data is released under CC0. Page built 1 Oct 2026; errors in processing are corrected at the next build (corrections). Disputes about a record go to the agency that holds it.