Top NRC other scientific and technical consulting services contractors
In the 12 months ending Oct 5, 2026, the Nuclear Regulatory Commission obligated $5.2M in net prime contract dollars under NAICS 541690, up 25.6% from $4.1M in the preceding 12 months. 9 prime contractors received positive obligations, and 3 of them accounted for 80% of that spend.
Prime contracts funded by the Nuclear Regulatory Commission. 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 NRC contractors for NAICS 541690
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 | Information Systems Laboratories, Inc. | $2.0M | $1.7M | 38.0% | — |
| 2 | ICF Incorporated, L.L.C. | $1.7M | $467K | 32.2% | ▲ 2 |
| 3 | Energy Research Inc | $568K | $234K | 11.0% | ▲ 3 |
| 4 | Regents of the University of Michigan | $310K | $220K | 6.0% | ▲ 3 |
| 5 | Engineering Mechanics Corporation of Columbus | $238K | $510K | 4.6% | ▼ 2 |
| 6 | Numark Associates, Inc | $134K | $40K | 2.6% | ▲ 3 |
| 7 | AFM, LLC | $134K | $0 | 2.6% | New |
| 8 | Hambric Stephen | $115K | $65K | 2.2% | — |
| 9 | S C & a Inc | $41K | $409K | 0.8% | ▼ 4 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- ICF Incorporated, L.L.C.$467K → $1.7M (+$1.2M) · now #2
- Energy Research Inc$234K → $568K (+$334K) · now #3
- Information Systems Laboratories, Inc.$1.7M → $2.0M (+$283K) · now #1
Largest declines
- Beckman & Associates Inc$541K → $0 (−$541K) · no latest-period obligations
- S C & a Inc$409K → $41K (−$368K) · now #9
- Engineering Mechanics Corporation of Columbus$510K → $238K (−$271K) · now #5
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 |
|---|---|---|
| AFM, LLC | Sep 1, 2026 | $134K |
Where the money comes from
Funding sub-agencies within the Nuclear Regulatory Commission, 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 |
|---|---|---|---|
| Nuclear Regulatory Commission | $5.2M | $4.1M | Up $1.1M (25.6%) |
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 |
|---|---|---|---|
| 31310023F0067 | ICF Incorporated, L.L.C. FINAL RULE - 10 CFR PART 53: RISK-INFORMED, TECHNOLOGY-INCLUSIVE REGULATORY FRAMEWORK FOR ADVANCED REACTORS RULEMAKING | $1.0M | Dec 31, 2026 |
| 31310023F0058 | Information Systems Laboratories, Inc. SNAP DEVELOPMENT, MAINTENANCE, AND SUPPORT ACTIVITIES FOR RES/DSA/CRAB | $1.5M | Jan 31, 2027 |
| 31310023F0047 | Regents of the University of Michigan CONTRACTOR SUPPORT FOR THE PURDUE ADVANCED REACTOR CORE SIMULATOR (PARCS) CODE SUITE | $1.2M | Jan 31, 2027 |
| 31310026F0009 | ICF Incorporated, L.L.C. EXECUTIVE ORDER 14300 RULEMAKING SUPPORT | $1.6M | Jun 8, 2027 |
Common questions
Who are the top NRC contractors for NAICS 541690?
In the latest 12 months, Information Systems Laboratories, Inc. ($2.0M), ICF Incorporated, L.L.C. ($1.7M), Energy Research Inc ($568K) received the most NRC obligations for other scientific and technical consulting services.
How concentrated is this market?
The eight largest primes held 99.2% of positive obligations, and Information Systems Laboratories, Inc. alone held 38.0%. 1 contractors won their first obligations in this market during the latest 12 months.
Are any large NRC NAICS 541690 contracts ending soon?
4 of the largest awards in this market reach their current end date in the next 18 months. The first is 31310023F0067 (ICF Incorporated, L.L.C., $1.0M obligated), ending Dec 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
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$24.9MFigures 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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