NAICS codes › 541620
NAICS 541620 — Environmental Consulting Services: federal contracts
7 open federal contract opportunities classified under NAICS 541620 (Environmental Consulting Services) on SAM.gov, refreshed nightly.
Open solicitations
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- H941--Chemical Hoods & HEPA PM
- R--Sources Sought and RFI (Recompete 68HERC21D0006)
- BPA Call Order Exceeding $20,000 Synopsis Requisition 1173128
- USDA Forest Service Dakota Skipper Habitat Survey and Mapping
- Fort Leavenworth Underground Fuel Tank Testing and Repair Services
- H346--Legionella Water Testing
- Requirement to support the Formerly Used Defense Sites (FUDS) Program Single Award Task Order Contract (SATOC)
Who buys NAICS 541620
| Agency | Obligations, 24 mo | Actions |
|---|---|---|
| Environmental Protection Agency (EPA) | $395.9M | 715 |
| Department of Homeland Security (DHS) | $257.2M | 125 |
| Department of Defense (DoD) | $216.7M | 576 |
| Department of the Interior (DOI) | $151.0M | 614 |
| Department of Commerce (DOC) | $70.9M | 84 |
| National Aeronautics and Space Administration (NASA) | $52.9M | 37 |
| Department of Transportation (DOT) | $42.7M | 84 |
| Department of Energy (DOE) | $41.7M | 36 |
| Department of Agriculture (USDA) | $38.4M | 238 |
| Department of Health and Human Services (HHS) | $29.0M | 62 |
Who wins NAICS 541620 work
| Contractor | Obligations, 24 mo | Awards |
|---|---|---|
| VERNADERO GROUP INC | $73.0M | 20 |
| WESTON SOLUTIONS INC | $69.8M | 77 |
| GULF SOUTH RESEARCH CORP | $56.3M | 22 |
| THE CADMUS GROUP LLC | $55.2M | 59 |
| EASTERN RESEARCH GROUP INC | $54.8M | 114 |
| TETRA TECH, INC. | $37.8M | 36 |
| GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC. | $30.6M | 14 |
| RPI-CSS, LLC | $30.0M | 9 |
| ECO & ASSOCIATES, INC. | $27.6M | 8 |
| TETRA TECH, INC. | $23.1M | 24 |
NAICS 541620 contracts expiring in the next 18 months
1,510 contracts worth $2.4B. The largest:
| Incumbent | Buyer | What | Value | Ends | Est. solicitation | Record |
|---|---|---|---|---|---|---|
| PROJECT ENHANCEMENT CORPORATION | Department of Energy | 541620 Environmental Consulting Services | $125.0M | 31 December 2026 | Now / imminent | Details |
| LYNKER CORPORATION | NOAA | 541620 Environmental Consulting Services | $58.9M | 30 June 2027 | ~Q1 2027 | Details |
| LYNKER CORPORATION | NOAA | 541620 Environmental Consulting Services | $57.1M | 31 January 2027 | Now / imminent | Details |
| S C & A INC | Environmental Protection Agency | 541620 Environmental Consulting Services | $55.1M (2 orders) | 18 September 2027 | ~Q1 2027 | Details |
| PROJECT ENHANCEMENT CORPORATION | Department of Energy | 541620 Environmental Consulting Services | $39.7M | 30 April 2027 | ~Q4 2026 | Details |
| TETRA TECH, INC. | Environmental Protection Agency | 541620 Environmental Consulting Services | $38.9M (4 orders) | 31 December 2026 | Now / imminent | Details |
| WESTON SOLUTIONS INC | Environmental Protection Agency | 541620 Environmental Consulting Services | $32.0M (33 orders) | 31 December 2026 | Now / imminent | Details |
| WESTON-TECHLAW JV LLC | Environmental Protection Agency | 541620 Environmental Consulting Services | $31.6M (10 orders) | 24 July 2027 | ~Q1 2027 | Details |
| EASTERN RESEARCH GROUP INC | Environmental Protection Agency | 541620 Environmental Consulting Services | $31.6M | 15 February 2027 | Now / imminent | Details |
| PROJECT ENHANCEMENT CORPORATION | Department of Energy | 541620 Environmental Consulting Services | $31.0M | 31 March 2027 | Now / imminent | Details |
Every expiring NAICS 541620 contract →
Contracts and task orders from USASpending.gov (FPDS) whose period of performance ends within 18 months, valued at $25K or more, excluding IDIQ ceilings and government-owned, contractor-operated facility contracts. Co-terminous orders from the same vendor, agency, NAICS and PSC ending in the same month are grouped. The solicitation date is an estimate (about six months before the contract ends): FedSift does not know whether a follow-on has been posted, so check SAM.gov.
Open solicitations by set-aside
| Set-aside | Open |
|---|---|
| Small business | 3 |
| SDVOSB | 2 |
| Unrestricted (full and open) | 2 |
From the set-aside SAM.gov declares on each open notice.
Who counts as small under this code
SBA size standard for NAICS 541620: $15.5M annual receipts.
Each solicitation carries exactly one NAICS code, and that code — not a related one in the same family — decides who counts as small.
One code, chosen by the contracting officer, decides who counts as small. A related code in the same family does not qualify you, and the assignment itself can be appealed to SBA OHA.
Source: FAR 19.102, current as of 07 August 2026 · eCFR.
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