Government Environmental Consulting Contracts
NAICS 541620 · Environmental Consulting Services
Government environmental consulting contracts totaled $3.7B across 10,723 awards from FY2024 to FY2026. In FY2026, obligations were down 6.2% compared with FY2025, while the Environmental Protection Agency was the largest buyer, accounting for $1.1B, or 31% of the total spending.
Key figures
In FY2026, contract obligations were $1,075,809,975 across 4,511 awards with activity that year, a change of -6.2% from $1,146,542,149 in FY2025. From FY2024 to FY2026, obligations totaled $3,672,622,142 across 10,723 awards.
- Obligated in FY2026
- $1.1B
- Awards in FY2026
- 4,511
- Change vs FY2025
- -6.2%
- Total, FY2024 to FY2026
- $3.7B
Note: FY2026 ended on Sep 30, 2026. The Department of Defense publishes contract data with a 90-day delay, so FY2026 totals may still rise as late reports arrive.
Environmental Consulting contract spending by year
Federal environmental consulting contracts per fiscal year (October to September), under NAICS 541620. The table below lists the same numbers.
| Fiscal year | Obligated | Awards | Change |
|---|---|---|---|
| FY2026 | $1,075,809,975 | 4,511 | -6.2% |
| FY2025 | $1,146,542,149 | 6,398 | -20.9% |
| FY2024 | $1,450,270,018 | 7,479 | n/a |
About government environmental consulting contracts
Federal spending on environmental consulting contracts fell 26% from FY2024 ($1.5B) to FY2026 ($1.1B). FY2026 closed recently, and Defense Department contracts are reported up to 90 days late, so its total may still rise.
Spending is spread widely: the top 3 contractors account for 13% of the total. No single company dominates, which leaves room for new and small contractors.
The Environmental Protection Agency spends the most on environmental consulting contracts (31%), followed by the Department of Defense. The states with the most of this work are Virginia, District of Columbia and Massachusetts.
NAICS 541620 (Environmental Consulting Services) is part of the Professional, Scientific, and Technical Services sector.
Top environmental consulting government contractors
Companies ranked by contract dollars under NAICS 541620 (Environmental Consulting Services).
| # | Contractor | Obligated | Share |
|---|---|---|---|
| 1 | Eastern Research Group Inc | $219,263,977 | 6.0% |
| 2 | Project Enhancement Corporation | $143,582,539 | 3.9% |
| 3 | The Cadmus Group LLC | $129,877,728 | 3.5% |
| 4 | Weston Solutions Inc | $125,964,446 | 3.4% |
| 5 | Lynker Corporation | $112,264,109 | 3.1% |
| 6 | S C & a Inc | $107,583,879 | 2.9% |
| 7 | General Dynamics Information Technology, Inc. | $98,252,524 | 2.7% |
| 8 | Vernadero Group Inc | $80,984,955 | 2.2% |
| 9 | Tetra Tech, Inc. | $64,184,651 | 1.7% |
| 10 | Gulf South Research Corp | $63,881,704 | 1.7% |
Agencies buying environmental consulting services
Federal agencies ranked by contract dollars under NAICS 541620.
| # | Agency | Obligated | Share |
|---|---|---|---|
| 1 | Environmental Protection Agency | $1,135,459,125 | 30.9% |
| 2 | Department of Defense | $741,668,680 | 20.2% |
| 3 | Department of Homeland Security | $353,906,429 | 9.6% |
| 4 | Department of Commerce | $306,673,624 | 8.4% |
| 5 | Department of the Interior | $304,111,332 | 8.3% |
| 6 | Department of Energy | $229,545,889 | 6.3% |
| 7 | National Aeronautics and Space Administration | $136,488,429 | 3.7% |
| 8 | General Services Administration | $109,473,720 | 3.0% |
| 9 | Department of Agriculture | $82,323,509 | 2.2% |
| 10 | Department of Transportation | $73,789,301 | 2.0% |
Where environmental consulting contract work is performed
States ranked by contract dollars, using the place of performance on each award.
| # | State | Obligated | Share |
|---|---|---|---|
| 1 | Virginia | $442,243,455 | 12.0% |
| 2 | District of Columbia | $353,840,713 | 9.6% |
| 3 | Massachusetts | $306,739,048 | 8.4% |
| 4 | Maryland | $304,914,396 | 8.3% |
| 5 | California | $232,319,486 | 6.3% |
| 6 | Texas | $231,722,234 | 6.3% |
| 7 | Arizona | $156,124,198 | 4.3% |
| 8 | Colorado | $121,855,954 | 3.3% |
| 9 | Pennsylvania | $113,424,334 | 3.1% |
| 10 | Florida | $106,881,691 | 2.9% |
Recent environmental consulting contract awards
The latest environmental consulting contracts, newest first. Each award ID links to its record on USAspending.gov.
| Start date | Recipient | Agency and description | Amount | Record |
|---|---|---|---|---|
| Sep 30, 2026 | Signature Science LLC | Department of Homeland SecurityTHE PURPOSE OF THIS MODIFICATION IS TO EXERCISE OPTION PERIOD FOUR (4). THIS REPLACES CONTRACT NUMBER 70RWMD22F00000035. | $3,283,470 | 70FA9026F00000011 |
| Sep 30, 2026 | Stantec Consulting Services Inc. | Department of Health and Human ServicesOFAAM78 C 6409 - ENVIRONMENTAL FOR CONSTRUCTION EARMARKS | $2,255,815 | 75R60226F34015 |
| Sep 30, 2026 | The Cadmus Group LLC | Department of Health and Human ServicesEXERCISE, EVALUATION AND AFTER-ACTION (E2A2) | $114,434 | 75A50226F62012 |
| Sep 30, 2026 | The Cadmus Group LLC | Department of Health and Human ServicesCORRECTIVE ACTION PROGRAM AND CAP TOOL MANAGEMENT | $156,291 | 75A50226F62011 |
| Sep 30, 2026 | The Cadmus Group LLC | Department of Health and Human ServicesCORRECTIVE ACTION PROGRAM (CAP) | $72,060 | 75A50226F62010 |
| Sep 30, 2026 | Agile Facilities Solutions, LLC | Department of Homeland SecurityTHE PURPOSE OF THIS TASK ORDER IS FOR SAFETY, ENVIRONMENTAL, AND SUPPORT SERVICES. ALL GSA CONTRACT 47QRAA26D008J CLAUSES SHALL FLOW DOWN TO THIS TASK ORDER. | $2,918,669 | 70US0926F2GSA2419 |
| Sep 30, 2026 | S C & a Inc | Department of Homeland SecurityDEVELOPMENT OF ENVIRONMENTAL PLANNING AND HISTORIC PRESERVATION REGULATORY SUPPORT AND TECHNICAL ANALYSIS IN SUPPORT OF COMPLIANCE WITH THE NATIONAL ENVIRONMENTAL POLICY ACT (NEPA), NATIONAL HISTORIC | $657,964 | 70RDA126FC0000066 |
| Sep 30, 2026 | Eastern Research Group Inc | Environmental Protection AgencyWASTE AND CHEMICAL ENFORCEMENT DIVISION RESOURCE CONSERVATION & RECOVERY ACT (RCRA) INVESTIGATIONS AND TECHNICAL SUPPORT | $80,000 | 68HERL26F0243 |
| Sep 30, 2026 | Eastern Research Group Inc | Environmental Protection AgencyWASTE AND CHEMICAL ENFORCEMENT DIVISION SUPPORT TSCA AND TRI ENFORCEMENT SUPPORT | $380,000 | 68HERL26F0242 |
| Sep 30, 2026 | Eastern Research Group Inc | Environmental Protection AgencyCLEAN AIR ENFORCEMENT, COMPLIANCE, LITIGATION AND TECHNICAL SKILL SUPPORT FOR MOBILE SOURCES | $200,000 | 68HERL26F0238 |
| Sep 30, 2026 | Eastern Research Group Inc | Environmental Protection AgencyCLEAN AIR ACT STATIONARY CASE SUPPORT SERVICES PSC:R499 | $307,000 | 68HERL26F0226 |
| Sep 30, 2026 | Eastern Research Group Inc | Environmental Protection AgencyFIFRA INVESTIGATIONS AND TECHNICAL SUPPORT SERVICES PSC:R499 | $20,000 | 68HERL26F0223 |
| Sep 30, 2026 | Eastern Research Group Inc | Environmental Protection AgencyCHEMICAL RISK INVESTIGATIONS AND TECHNICAL SUPPORT SERVICES PSC:R499 | $709,000 | 68HERL26F0222 |
| Sep 30, 2026 | Eastern Research Group Inc | Environmental Protection AgencyWATER ENFORCEMENT, COMPLIANCE, LITIGATION AND TECHNICAL SKILL SUPPORT SERVICES PSC:R499 | $938,859 | 68HERL26F0221 |
| Sep 30, 2026 | Environmental Management Support, Inc | Environmental Protection AgencyOLEM LARGE MISSION SUPPORT CALL ORDER TITLE: SUPERFUND JOB TRAINING INITIATIVE (SUPERJTI) | $877,500 | 68HERL26F0182 |
| Sep 30, 2026 | Environmental Management Support, Inc | Environmental Protection AgencyOLEM LARGE MISSION SUPPORT CALL ORDER TITLE: SUPERFUND TECHNICAL ASSISTANCE SERVICES FOR COMMUNITIES | $2,381,895 | 68HERL26F0173 |
| Sep 30, 2026 | WSP USA Environment & Infrastructure Inc. | Environmental Protection AgencyR408 LOGISTICAL AND MOVE SUPPORT, TRANSITION MANAGEMENT, AND ENVIRONMENTAL DUE DILIGENCE PROCESS AT THE U.S. EPA'S REGION 6 LABORATORY | $2,056,168 | 68HERF26F0157 |
| Sep 30, 2026 | Alta Science & Engineering Inc | Environmental Protection Agency(REGION 8)RESOURCE CONSERVATION AND RECOVERY ACT (RCRA) ENFORCEMENT, PERMITTING AND ASSISTANCE (REPA) 7 | $40,000 | 68HE0826F0071 |
| Sep 30, 2026 | Toeroek Associates, Inc. | Environmental Protection AgencyRCRA ENFORCEMENT, PERMITTING AND ASSISTANCE (REPA) | $538,313 | 68HE0526F0182 |
| Sep 30, 2026 | Weston Solutions Inc | Environmental Protection AgencyESTABLISH NEW START 7 TO # 1 AND PROVIDE INITIAL INCREMENTAL FUNDING IN THE AMOUNT OF $3,946,468.00 | $3,946,468 | 68HE0326F0148 |
| Sep 30, 2026 | Castle Hill Associates, LLC | Department of Veterans AffairsAHERA SURVEYS | $16,590 | 36C25026F0785 |
| Sep 29, 2026 | Bb&E, Inc. | National Aeronautics and Space AdministrationNASA NESS GRC ORDER | $514,266 | 80NSSC26F0125 |
| Sep 29, 2026 | Straughan Environmental, Inc. | National Aeronautics and Space AdministrationJSC ENVIRONMENTAL SERVICES TEAM II CALL 5 / 80JSC026FA151 TO EXECUTE T&M REQUIREMENTS GS-10F-014CA / 80JSC024AA029 | $279,524 | 80JSC026FA151 |
| Sep 29, 2026 | Straughan Environmental, Inc. | National Aeronautics and Space AdministrationJSC ENVIRONMENTAL SERVICES II CALL 4 / 80JSC026FA148 TO EXECUTE FFP CORE REQUIREMENTS GS-10F-014CA / 80JSC024AA029 | $709,836 | 80JSC026FA148 |
| Sep 29, 2026 | Property & Environmental Management Inc | Department of Health and Human ServicesISSUE TASK ORDER NUMBER 75P00125D00003/7571MN26F66006. PERIOD OF PERFORMANCE: 9/30/2026 THROUGH 09/29/2027 | $538,704 | 7571MN26F66006 |
Open environmental consulting government bids
The newest open notices from SAM.gov. Bidding needs a free SAM.gov registration.
Dept of Defense · Combined Synopsis/Solicitation · NAICS 541620 · AR · Small Business Set Aside - Total
Posted Oct 30, 2026 · Responses due Nov 12, 2026
Dept of Defense · Combined Synopsis/Solicitation · NAICS 541620 · AR · Small Business Set Aside - Total
Posted Oct 29, 2026 · Responses due Nov 12, 2026
Dept of Defense · Solicitation · NAICS 541620 · Small Business Set Aside - Total
Posted Oct 29, 2026 · Responses due Nov 11, 2026
Agriculture, Department of · Combined Synopsis/Solicitation · NAICS 541620 · ND · Small Business Set Aside - Total
Posted Oct 29, 2026 · Responses due Nov 5, 2026
How to win government environmental consulting contracts
Federal environmental consulting contracts are posted on SAM.gov under NAICS 541620. Register your business free on SAM.gov with this code, watch for environmental consulting bids, and look for small business set-asides: many environmental consulting contracts for small business are reserved for small firms.
Explore government environmental consulting contracts by state, agency and contractor
- Environmental Protection Agency contracts
- Department of Defense contracts
- Department of Homeland Security contracts
- Department of Commerce contracts
- Department of the Interior contracts
- Government contracts in Virginia
- Government contracts in District of Columbia
- Government contracts in Massachusetts
- Government contracts in Maryland
- Government contracts in California
- Weston Solutions government contracts
Frequently asked questions
- What NAICS code is used for government environmental consulting contracts?
- Federal environmental consulting contracts use NAICS 541620 (Environmental Consulting Services). List this code in your free SAM.gov registration to be found for these contracts.
- Who are the largest environmental consulting government contractors?
- By contract dollars under NAICS 541620 from FY2024 to FY2026, the largest were Eastern Research Group Inc ($219M), Project Enhancement Corporation ($144M) and The Cadmus Group LLC ($130M).
- Which agencies buy the most environmental consulting?
- From FY2024 to FY2026, the biggest buyers were the Environmental Protection Agency ($1.1B), the Department of Defense ($742M) and the Department of Homeland Security ($354M).
- Where are government environmental consulting contracts performed?
- By contract dollars, the most federal environmental consulting work is performed in Virginia ($442M), District of Columbia ($354M) and Massachusetts ($307M).
- Is federal spending on environmental consulting contracts growing?
- Federal environmental consulting contract obligations fell 26% from FY2024 ($1.5B) to FY2026 ($1.1B). FY2026 closed recently, and Defense Department contracts are reported up to 90 days late, so its total may still rise.
- Do I qualify as a small business for environmental consulting contracts?
- It depends on the SBA size standard for NAICS 541620, which is set either by average annual revenue or by number of employees. Check the current table of size standards on sba.gov before you bid on small business set-asides.
- What do I need to bid on government environmental consulting contracts?
- An active SAM.gov registration (free) with NAICS 541620 listed, the licenses and insurance your state requires for environmental consulting work, and examples of similar past work. Some solicitations also ask for specific certifications or security clearances.