Top NASA environmental consulting services contractors
In the 12 months ending Oct 5, 2026, the National Aeronautics and Space Administration obligated $38.7M in net prime contract dollars under NAICS 541620, down 37.3% from $61.7M in the preceding 12 months. 11 prime contractors received positive obligations, and 6 of them accounted for 80% of that spend.
Prime contracts funded by the National Aeronautics and Space Administration. Latest 12 months: Oct 6, 2025 to Oct 5, 2026. Source: USAspending.gov.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top NASA contractors for NAICS 541620
Ranked by positive obligations in the latest 12 months. Share is of all positive obligations in this market.
| # | Contractor | Latest 12 mo | Prior 12 mo | Share | Rank change |
|---|---|---|---|---|---|
| 1 | Tetra Tech, Inc. | $10.5M | $24.3M | 27.0% | — |
| 2 | Jacobs Geosyntec a Joint Venture | $7.7M | $13.5M | 19.9% | — |
| 3 | Hydrogeologic, Inc. | $5.5M | $2.0M | 14.1% | ▲ 4 |
| 4 | HSG, LLC | $3.5M | $9.2M | 9.1% | ▼ 1 |
| 5 | Straughan Environmental, Inc. | $3.3M | $4.4M | 8.6% | ▼ 1 |
| 6 | DDC 4c, LLC | $3.1M | $0 | 8.0% | New |
| 7 | BB&E, Inc. | $2.2M | $599K | 5.6% | ▲ 1 |
| 8 | Bluestone Environmental Group, Inc. | $1.7M | $3.6M | 4.5% | ▼ 3 |
| 9 | The Boeing Company | $1.1M | $0 | 2.8% | New |
| 10 | AECOM Technical Services, Inc. | $98K | $3.6M | 0.3% | ▼ 4 |
| 11 | Virginia Department of Environmental Quality | $31K | $0 | 0.1% | New |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Hydrogeologic, Inc.$2.0M → $5.5M (+$3.5M) · now #3
- DDC 4c, LLC$0 → $3.1M (+$3.1M) · now #6
- BB&E, Inc.$599K → $2.2M (+$1.6M) · now #7
Largest declines
- Tetra Tech, Inc.$24.3M → $10.5M (−$13.9M) · now #1
- Jacobs Geosyntec a Joint Venture$13.5M → $7.7M (−$5.7M) · now #2
- HSG, LLC$9.2M → $3.5M (−$5.6M) · now #4
New to this market
3 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| DDC 4c, LLC | Jul 27, 2026 | $3.1M |
| The Boeing Company | Jul 17, 2026 | $1.1M |
| Virginia Department of Environmental Quality | Sep 22, 2026 | $31K |
Where the money comes from
Funding sub-agencies within the National Aeronautics and Space Administration, latest 12 months. The funding organization can differ from the office that runs the requirement.
| Funding sub-agency | Latest 12 mo | Prior 12 mo | Change |
|---|---|---|---|
| National Aeronautics and Space Administration | $38.7M | $61.7M | Down $23.0M (37.3%) |
Potential recompetes
Large awards in this market whose current period of performance ends in the next 18 months. Treat these as research leads: options, extensions, and follow-on vehicles often change the timing.
| Award | Incumbent | Obligated | Current end |
|---|---|---|---|
| 80KSC019F0141 | Tetra Tech, Inc. PER- AND POLYFLUOROALKYL SUBSTANCES PRELIMINARY OR SOLID WASTE MANAGEMENT UNIT (SWMU) ASSESSMENT AND SITE INVESTIGATION OR CONFIRMATION SAMPLING AT VARIOUS NASA CENTERS OR… | $5.8M | Oct 31, 2026 |
| 80KSC021F0096 | AECOM Technical Services, Inc. PERFLUOROALKYL (PER)- AND POLYFLUOROALKYL SUBSTANCES SITE ASSESSMENT AND MITIGATION AT KENNEDY SPACE CENTER, FLORIDA | $8.6M | Nov 30, 2026 |
| 80ARC026FA032 | Hydrogeologic, Inc. THIS CONTRACT PROVIDES ENVIRONMENTAL RESTORATION SERVICES IN SUPPORT OF THE VARIOUS MISSIONS AT NASA AMES RESEARCH CENTER (ARC) IN MOFFETT FIELD, CA 94035. | $2.9M | Jan 30, 2027 |
| 80NSSC26F0070 | DDC 4c, LLC NASA ENVIRONMENTAL SUPPORT SERVICES (NESS) ORDER GODDARD SPACE FLIGHT CENTER (GSFC/WFF) | $3.1M | Jul 31, 2027 |
| 80MSFC25FA092 | Jacobs Geosyntec a Joint Venture THE OBJECTIVE OF THIS TASK ORDER (TO) IS TO PROVIDE RESTORATION SERVICES TO COMPLETE REMEDIAL ACTIVITIES UNDER CERCLA. | $9.3M | Sep 30, 2027 |
| 80MSFC24F0118 | HSG, LLC NEMCON IDIQ TASK ORDER IS TO PROVIDE OCCUPATIONAL HEALTH SERVICES (OHS) FOR MSFC, WHICH INCLUDES OCCUPATIONAL MEDICINE, EMPLOYEE ASSISTANCE PROGRAM, INDUSTRIAL HYGIENE, HEALTH… | $7.0M | Sep 30, 2027 |
| 80NM0025FA001 | Tetra Tech, Inc. SITE WIDE PROGRAM SUPPORT AND PFAS ASSESSMENT, NASA JPL AND GDSCC | $4.6M | Sep 30, 2027 |
| 80KSC025F0008 | Tetra Tech, Inc. ENVIRONMENTAL SERVICES AT STENNIS SPACE CENTER TO INCLUDE NASA SHARED SERVICES CENTER (NSSC) AND NATIONAL CENTER FOR CRITICAL INFORMATION PROCESSING AND STORAGE (NCCIPS). | $3.1M | Sep 30, 2027 |
| 80GSFC24FA024 | Tetra Tech, Inc. TASK ORDER - SITEWIDE PFAS AND PROGRAM SUPPORT AT WALLOPS FLIGHT FACILITY, WALLOPS ISLAND, VA. ISSUED UNDER - KSC NASA ENVIRONMENTAL RESTORATION AND COMPLIANCE CONTRACT (NERCC). | $7.4M | Dec 28, 2027 |
| 80GSFC24FA037 | Hydrogeologic, Inc. TASK ORDER - FORMERLY USED DEFENSE SITES (FUDS) AT WALLOPS FLIGHT FACILITY, WALLOPS ISLAND, VA. ISSUED UNDER - KSC NASA ENVIRONMENTAL RESTORATION AND COMPLIANCE CONTRACT (NERCC). | $5.8M | Dec 31, 2027 |
Common questions
Who are the top NASA contractors for NAICS 541620?
In the latest 12 months, Tetra Tech, Inc. ($10.5M), Jacobs Geosyntec a Joint Venture ($7.7M), Hydrogeologic, Inc. ($5.5M) received the most NASA obligations for environmental consulting services.
How concentrated is this market?
The eight largest primes held 96.9% of positive obligations, and Tetra Tech, Inc. alone held 27.0%. 3 contractors won their first obligations in this market during the latest 12 months.
Are any large NASA NAICS 541620 contracts ending soon?
10 of the largest awards in this market reach their current end date in the next 18 months. The first is 80KSC019F0141 (Tetra Tech, Inc., $5.8M obligated), ending Oct 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
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$19.1MFigures are net obligations on prime contracts (award types A–D) from USAspending.gov, grouped by funding agency and the NAICS code on each award. Net obligations include deobligations and corrections, so they can differ from positive-obligation totals. See methodology.
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