Data / Federal awards / NAICS 541620 / Department of the Treasury
Department of the Treasury contracts under NAICS 541620 Environmental Consulting Services: $10.9 million to 29 recipients (FY2024 to FY2027)
Updated October 6, 2026. Source: USAspending.gov.
Department of the Treasury obligated $10.9 million under NAICS 541620, Environmental Consulting Services, across 109 contract awards to 29 named recipients in fiscal years 2024 to 2027. The largest recipients are CLEAN HARBORS ENVIRONMENTAL SERVICES INC ($3.2 million), KONIAG OPERATIONS SERVICES LLC ($2.5 million), BARBER AND MANN INC ($2.0 million). 13 opportunities under this code are open on SAM.gov now.
The request: Every federal contract awarded by Department of the Treasury under NAICS 541620, with the winner, the value and the period of performance. $10 of work on sign-up, no card.
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- Agency
- Department of the Treasury
- NAICS code
- 541620 Environmental Consulting Services
- Contract awards
- 109
- Obligated
- $10.9 million
- Named recipients
- 29
- Small business share of obligations
- 53%
- Full and open competition share
- 39%
- Set aside share
- 25%
- Latest action
- 2026-09-28
Open opportunities in this niche
The same code on SAM.gov, read each morning: 13 opportunities you can still respond to.
Incumbents at this agency
Ranked by dollars obligated in fiscal years 2024 to 2027.
| Recipient | Business size | Awards | Obligated | Share |
|---|---|---|---|---|
| CLEAN HARBORS ENVIRONMENTAL SERVICES INC | Other Than Small Business | 12 | $3.2 million | 29.0% |
| KONIAG OPERATIONS SERVICES LLC | Small Business | 1 | $2.5 million | 22.6% |
| BARBER AND MANN INC | Small Business | 2 | $2 million | 18.1% |
| THE BRATTLE GROUP INC | Other Than Small Business | 2 | $2 million | 18.0% |
| G-A-I CONSULTANTS INC | Other Than Small Business | 4 | $985,100 | 9.0% |
| CENPEC, LLC | Small Business | 4 | $983,396 | 9.0% |
| CENTAUR CONSULTING GROUP LLC | Small Business | 1 | $208,022 | 1.9% |
| NATIONAL ECONOMIC RESEARCH ASSOCIATES INC | Other Than Small Business | 3 | $172,847 | 1.6% |
| POTOMAC-HUDSON ENGINEERING INC | Small Business | 2 | $145,476 | 1.3% |
| PACARCTIC, LLC | Small Business | 1 | $143,891 | 1.3% |
| DAYTON GROUP INC | Small Business | 7 | $108,857 | 1.0% |
| ENVIRONMENTAL CONSULTING GROUP, INC. | Small Business | 2 | $95,839 | 0.9% |
| AMTIVO (USA) INC. | Small Business | 1 | $82,500 | 0.8% |
| MABBETT & ASSOCIATES, INC. | Small Business | 1 | $65,748 | 0.6% |
| CHENIER ENVIRONMENTAL CONSULTING, LLC | Small Business | 1 | $62,238 | 0.6% |
| P. E. LAMOREAUX & ASSOCIATES, INC. | Small Business | 9 | $37,455 | 0.3% |
| ATI, INC. | Small Business | 2 | $23,375 | 0.2% |
| MTC CONSULTING LLC | Small Business | 17 | $21,551 | 0.2% |
| COMPLIANCE MANAGEMENT INTERNATIONAL, INC. | Small Business | 1 | $19,730 | 0.2% |
| TERRACON CONSULTANTS, INC. | Other Than Small Business | 1 | $3,642 | 0.0% |
| SELLERS REALTY, LLC | Small Business | 1 | $0 | 0.0% |
| LINDAHL REED, INC. | Small Business | 1 | $0 | 0.0% |
| SCA ENVIRONMENTAL, INC | Small Business | 1 | $-20,000 | -0.2% |
| RYDER SCOTT COMPANY, L.P. | Small Business | 1 | $-40,638 | -0.4% |
| C.J. SETO SUPPORT SERVICES, LLC | Small Business | 1 | $-95,355 | -0.9% |
| CONSERVATION SCIENCE INC | Small Business | 5 | $-123,876 | -1.1% |
| LAMPL/HERBERT CONSULTANTS, INC. | Small Business | 6 | $-132,877 | -1.2% |
| PG ENVIRONMENTAL, LLC | Other Than Small Business | 1 | $-165,407 | -1.5% |
| RESEARCH PLANNING, INC. | Small Business | 5 | $-1,061,772 | -9.7% |
Offices buying
| Sub agency | Awards | Obligated |
|---|---|---|
| Bureau of Engraving and Printing | 25 | $6.1 million |
| Internal Revenue Service | 64 | $4.7 million |
| Office of the Comptroller of the Currency | 1 | $693,749 |
| Bureau of the Fiscal Service | 8 | $498,154 |
| Treasury Common Services Center | 1 | $160,610 |
| United States Mint | 5 | $148,848 |
| Departmental Offices | 5 | $-1,387,789 |
Obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2024 | $5 million |
| FY2025 | $2.2 million |
| FY2026 | $3.7 million |
Products and services bought
| Code | Product or service | Awards | Obligated |
|---|---|---|---|
| R424 | Support- Professional: Expert Witness | 64 | $4.7 million |
| F108 | Environmental Systems Protection- Environmental Remediation | 19 | $3.3 million |
| F999 | Other Environmental Services | 4 | $2.8 million |
| R428 | Support- Professional: Industrial Hygienics | 4 | $582,035 |
| R499 | Support- Professional: Other | 7 | $539,211 |
| B502 | Special Studies/analysis- Air Quality | 2 | $95,839 |
| R420 | Support- Professional: Certifications and Accreditations (other Than Educ or Info Tech C&a) | 1 | $82,500 |
| F115 | Environmental Systems Protection- Environmental Consulting and Legal Support | 1 | $65,748 |
Largest contract awards
| Award ID | Recipient | Agency | Type | NAICS | What it buys | Obligated in window | Award value | Starts | Ends | Place of performance | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2031ZA25C00059 | KONIAG OPERATIONS SERVICES LLC | Department of the Treasury | Definitive Contract | 541620 | ENVIRONMENT, HEALTH AND SAFETY SUPPORT SERVICES | $2,473,514 | $2,473,514 | November 8, 2024 | November 7, 2026 | Washington, DC | usaspending.gov |
| 2023H224C00006 | BARBER AND MANN INC | Department of the Treasury | Definitive Contract | 541620 | EXPERT WITNESS SERVICES: IRS EXPERT WITNESSES THAT IS CAPABLE OF PROVIDING LITIGATION SUPPORT FOR CASES INVOLVING IRS AUDIT DEFENSE, PERFORM | $1,959,632 | $1,959,632 | March 15, 2024 | March 14, 2029 | Atlanta, GA | usaspending.gov |
| 2023H225C00103 | THE BRATTLE GROUP INC | Department of the Treasury | Definitive Contract | 541620 | THE IRS REQUIRES THE SERVICES OF AN EXPERT WITNESS IN CONNECTION WITH LITIGATION. TRACS0003368 WAS APPROVED ON 07/16/2025. | $1,352,300 | $1,352,300 | July 27, 2025 | July 26, 2030 | San Francisco, CA | usaspending.gov |
| 2031ZA26F00288 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC | Department of the Treasury | BPA Call | 541620 | WCF INDUSTRIAL HAZARDOUS / NON- HAZARDOUS WASTE DISPOSAL BPA CALL 5. | $832,000 | $832,000 | June 1, 2026 | May 31, 2027 | Fort Worth, TX | usaspending.gov |
| 2031ZA25F00382 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC | Department of the Treasury | BPA Call | 541620 | WCF INDUSTRIAL HAZARDOUS/ NON-HAZARDOUS WASTE DISPOSAL | $807,222 | $807,222 | June 1, 2025 | May 31, 2026 | Fort Worth, TX | usaspending.gov |
| 2031ZA25F00387 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC | Department of the Treasury | BPA Call | 541620 | DCF INDUSTRIAL HAZARDOUS AND NON-HAZARDOUS WASTE REMOVAL/DISPOSAL | $739,690 | $739,690 | June 1, 2025 | June 14, 2026 | Washington, DC | usaspending.gov |
| 2031JW24F00123 | CENPEC, LLC | Department of the Treasury | Delivery Order | 541620 | THE CONTRACTOR WILL PROVIDE EXPERTS EXPERIENCED IN OSH ISSUES TO ADVISE OCC STAFF ON A WIDE RANGE OF MATTERS, INCLUDING SHMS DEVELOPMENT, IM | $693,749 | $693,749 | September 27, 2024 | September 26, 2027 | Germantown, MD | usaspending.gov |
| 2031ZA24F00428 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC | Department of the Treasury | BPA Call | 541620 | WASTE DISPOSAL | $669,477 | $669,477 | June 1, 2024 | May 31, 2025 | Fort Worth, TX | usaspending.gov |
| 2023H225C00102 | THE BRATTLE GROUP INC | Department of the Treasury | Definitive Contract | 541620 | THE IRS REQUIRES THE SERVICES OF AN EXPERT WITNESS IN CONNECTION WITH LITIGATION. TRACS0003401 APPROVED ON 7/17/2025. | $612,610 | $612,610 | July 31, 2025 | July 30, 2030 | San Francisco, CA | usaspending.gov |
| 2031ZA24F00375 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC | Department of the Treasury | BPA Call | 541620 | FY24 DCF INDUSTRIAL HAZARDOUS AND NON-HAZARDOUS WASTE REMOVAL/DISPOSAL | $535,980 | $535,980 | June 1, 2024 | May 13, 2026 | Washington, DC | usaspending.gov |
| 2031ZA26F00323 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC | Department of the Treasury | BPA Call | 541620 | HAZARDOUS/NONHAZARDOUS WASTE REMOVAL SERVICES ORDERING PERIOD 4 | $455,039 | $455,039 | June 15, 2026 | May 31, 2027 | Washington, DC | usaspending.gov |
| 2023H226P00277 | LAMPL/HERBERT CONSULTANTS, INC. | Department of the Treasury | Purchase Order | 541620 | EXPERT WITNESS SERVICES REQUIRED FOR LITIGATION OF A CASE BY THE INTERNAL REVENUE SERVICE, CHIEF COUNSEL. PERIOD OF PERFORMANCE: 05/25/2026 | $331,472 | $331,472 | May 20, 2026 | May 24, 2031 | Tallahassee, FL | usaspending.gov |
| 2023H226P00091 | G-A-I CONSULTANTS INC | Department of the Treasury | Purchase Order | 541620 | EXPERT WITNESS SERVICES REQUIRED FOR LITIGATION OF A CASE BY IRS, CHIEF COUNSEL. | $249,470 | $249,470 | December 16, 2025 | December 15, 2030 | Homestead, PA | usaspending.gov |
| 2023H226P00099 | G-A-I CONSULTANTS INC | Department of the Treasury | Purchase Order | 541620 | EXPERT WITNESS SERVICES REQUIRED FOR THE LITIGATION OF A CASE BY THE INTERNAL REVENUE SERVICE, CHIEF COUNSEL. | $249,470 | $249,470 | December 18, 2025 | December 17, 2030 | Homestead, PA | usaspending.gov |
| 2023H226P00225 | G-A-I CONSULTANTS INC | Department of the Treasury | Purchase Order | 541620 | THE IRS REQUIRES THE SERVICES OF AN EXPERT WITNESS IN CONNECTION WITH LITIGATION. EXPERT WITNESS SERVICES - 05/01/2026 - 04/30/2031. | $243,080 | $243,080 | May 1, 2026 | April 30, 2031 | Atlanta, GA | usaspending.gov |
| 2023H226P00250 | G-A-I CONSULTANTS INC | Department of the Treasury | Purchase Order | 541620 | THE IRS REQUIRES THE SERVICES OF AN EXPERT WITNESS IN CONNECTION WITH LITIGATION. | $243,080 | $243,080 | May 14, 2026 | May 13, 2031 | Atlanta, GA | usaspending.gov |
| 2023H224P00173 | P. E. LAMOREAUX & ASSOCIATES, INC. | Department of the Treasury | Purchase Order | 541620 | EXPERT WITNESS SERVICES | $219,968 | $219,968 | May 15, 2024 | May 14, 2029 | Tuscaloosa, AL | usaspending.gov |
| 20340625F00009 | CENTAUR CONSULTING GROUP LLC | Department of the Treasury | Delivery Order | 541620 | TECHNICAL ASSISTANCE AND WORKSHOP FACILITATION SERVICES | $208,022 | $208,022 | April 30, 2025 | September 30, 2026 | Washington, DC | usaspending.gov |
| 20340625F00005 | CENPEC, LLC | Department of the Treasury | BPA Call | 541620 | EVENT PLANNING AND WORKSHOP FACILITATION SERVICES | $166,426 | $166,426 | December 23, 2024 | March 31, 2025 | Washington, DC | usaspending.gov |
| 2099AB26F00030 | RESEARCH PLANNING, INC. | Department of the Treasury | BPA Call | 541620 | SUPPORT SERVICES TO AID IN MEETING ITS COMPLIANCE AND OVERSIGHT RESPONSIBILITIES RELATED TO THE RESOURCES AND ECOSYSTEMS SUSTAINABILITY, TOU | $160,610 | $160,610 | September 28, 2026 | September 27, 2028 | Columbia, SC | usaspending.gov |
| 2031JG24F00453 | POTOMAC-HUDSON ENGINEERING INC | Department of the Treasury | Delivery Order | 541620 | UNITED STATES MINT ENVIRONMENTAL ASSESSMENTS OF THE UNITED STATES MINT FACILITIES | $145,476 | $145,476 | September 30, 2024 | September 27, 2027 | Rockville, MD | usaspending.gov |
| 2031ZA19C00236 | PACARCTIC, LLC | Department of the Treasury | Definitive Contract | 541620 | DCF EHS SERVICE | $143,891 | $4,294,674 | September 9, 2019 | November 8, 2024 | Washington, DC | usaspending.gov |
| 2091JB24P00139 | P. E. LAMOREAUX & ASSOCIATES, INC. | Department of the Treasury | Purchase Order | 541620 | EXPERT WITNESS SERVICE | $129,252 | $177,069 | February 23, 2024 | February 22, 2029 | Tuscaloosa, AL | usaspending.gov |
| 20340624F00020 | CENPEC, LLC | Department of the Treasury | BPA Call | 541620 | EVENT PLANNING AND WORKSHOP FACILITATION SERVICES | $123,221 | $123,221 | September 23, 2024 | March 31, 2027 | Washington, DC | usaspending.gov |
| 2023H223C00012 | NATIONAL ECONOMIC RESEARCH ASSOCIATES INC | Department of the Treasury | Definitive Contract | 541620 | EXPERT WITNESS SERVICES: IRS EXPERT WITNESSES THAT IS CAPABLE OF PROVIDING LITIGATION SUPPORT FOR CASES INVOLVING IRS AUDIT DEFENSE, PERFORM | $94,797 | $1,094,209 | April 10, 2023 | April 9, 2028 | Atlanta, GA | usaspending.gov |
Public U.S. federal spending data (U.S. Department of the Treasury). Obligations are the contract actions dated in fiscal years 2024 to 2027 of the USAspending.gov award archive of 2026-10-06; a contract's total value is its current value as USAspending reports it, including earlier years. Recipients are matched on their SAM.gov UEI, never on the name, and are shown as the government prints them. Sole proprietorships and opted-out entities count in the totals and are not named. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.