Top DOE all other support services contractors
In the 12 months ending Oct 5, 2026, the Department of Energy obligated $58.7M in net prime contract dollars under NAICS 561990, up 7.1% from $54.8M in the preceding 12 months. 5 prime contractors received positive obligations, and 1 of them accounted for 80% of that spend.
Prime contracts funded by the Department of Energy. 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 DOE contractors for NAICS 561990
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 | Isotek Systems, LLC | $57.9M | $54.1M | 97.1% | — |
| 2 | Alexton Incorporated | $1.1M | $947K | 1.9% | ▲ 1 |
| 3 | Chickasaw Service Solutions, LLC | $545K | $0 | 0.9% | New |
| 4 | ECO-Shred, LLC | $33K | $15K | 0.1% | ▲ 3 |
| 5 | Lincus Inc | $9K | $6K | 0.0% | ▲ 5 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Isotek Systems, LLC$54.1M → $57.9M (+$3.9M) · now #1
- Booz Allen Hamilton Inc−$1.6M → −$481K (+$1.1M) · no latest-period obligations
- Chickasaw Service Solutions, LLC$0 → $545K (+$545K) · now #3
Largest declines
- Montech Inc$1.2M → $0 (−$1.2M) · no latest-period obligations
- Chickasaw Strategic Pointe, LLC$440K → $0 (−$440K) · no latest-period obligations
- Greengate LLC$0 → −$353K (−$353K) · no latest-period obligations
New to this market
1 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Chickasaw Service Solutions, LLC | Mar 30, 2026 | $545K |
Where the money comes from
Funding sub-agencies within the Department of Energy, 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 |
|---|---|---|---|
| Department of Energy | $58.7M | $54.9M | Up $3.8M (7.0%) |
| Federal Energy Regulatory Commission | $15K | −$19K | Up $34K (175.8%) |
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 |
|---|---|---|---|
| 89243221CNE000020 | Montech Inc SUPPORT IS REQUESTED FOR IMPLEMENTATION OF THE DEPARTMENT OF ENERGY IDAHO OPERATIONS OFFICE (DOE-ID) PERSONNEL SECURITY PROGRAM AT THE IDAHO NATIONAL LABORATORY (INL). THE… | $3.5M | Dec 31, 2026 |
| 89303024CMA000112 | Alexton Incorporated 8(A) DIRECT AWARD TO ALEXTON INCORPORATED FOR CONFERENCE SUPPORT SERVICES PERIOD OF PERFORMANCE 03/16/2024 TO 03/15/2027 REQ 24MA000134 SUBJECT TO AVAILABILITY OF FUNDS | $3.2M | Mar 15, 2027 |
Common questions
Who are the top DOE contractors for NAICS 561990?
In the latest 12 months, Isotek Systems, LLC ($57.9M), Alexton Incorporated ($1.1M), Chickasaw Service Solutions, LLC ($545K) received the most DOE obligations for all other support services.
How concentrated is this market?
The eight largest primes held 100.0% of positive obligations, and Isotek Systems, LLC alone held 97.1%. 1 contractors won their first obligations in this market during the latest 12 months.
Are any large DOE NAICS 561990 contracts ending soon?
2 of the largest awards in this market reach their current end date in the next 18 months. The first is 89243221CNE000020 (Montech Inc, $3.5M obligated), ending Dec 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
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$10.1MFigures 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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