Top OPM human resources consulting services (2007), human resources and executive search consulting services (2002) contractors
In the 12 months ending Oct 5, 2026, the Office of Personnel Management obligated $28.4M in net prime contract dollars under NAICS 541612, up 77.2% from $16.0M in the preceding 12 months. 8 prime contractors received positive obligations, and 2 of them accounted for 80% of that spend.
Prime contracts funded by the Office of Personnel Management. 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 OPM contractors for NAICS 541612
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 | Deloitte Consulting LLP | $19.2M | $14.3M | 67.7% | — |
| 2 | Windsor Group LLC | $3.5M | $0 | 12.3% | New |
| 3 | Knowledgebank, Inc. | $1.5M | $1.2M | 5.3% | ▲ 1 |
| 4 | Calibre Systems Inc | $1.5M | $822K | 5.1% | ▲ 2 |
| 5 | Dynamis, Inc. | $1.3M | $1.2M | 4.6% | ▼ 2 |
| 6 | Human Resources Research Organization (Humrro) | $1.1M | $0 | 3.8% | New |
| 7 | Codesignal Inc | $304K | $0 | 1.1% | New |
| 8 | Economic Systems Inc | $35K | $33K | 0.1% | — |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Your Recruiting Company, Inc.−$5.9M → $0 (+$5.9M) · no latest-period obligations
- Deloitte Consulting LLP$14.3M → $19.2M (+$5.0M) · now #1
- Windsor Group LLC$0 → $3.5M (+$3.5M) · now #2
Largest declines
- Advent Svcs LLC$3.1M → $0 (−$3.1M) · no latest-period obligations
- Personnel Decisions Research Institutes, LLC$916K → $0 (−$916K) · no latest-period obligations
- C Evans Consulting LLC$415K → $0 (−$415K) · no latest-period obligations
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 |
|---|---|---|
| Windsor Group LLC | Sep 29, 2026 | $3.5M |
| Human Resources Research Organization (Humrro) | Jan 20, 2026 | $1.1M |
| Codesignal Inc | Dec 3, 2025 | $304K |
Where the money comes from
Funding sub-agencies within the Office of Personnel Management, 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 |
|---|---|---|---|
| Office of Personnel Management | $28.4M | $16.0M | Up $12.4M (77.2%) |
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 |
|---|---|---|---|
| 47QACA25F0365 | Advent Svcs LLC CLASSIFICATION SURGE SUPPORT TO ASSIST IN DEVELOPING ONTOLOGICAL MODELS THAT MAP JOB ROLES, COMPETENCIES, AND TASKS TO SUPPORT THE INTEGRATION OF VALIDATED TECHNICAL AND GENERAL… | $3.1M | Dec 28, 2026 |
| 47QACA26F0165 | Knowledgebank, Inc. UNITED STATES COAST GUARD USCG HUMAN CAPITAL SUPPORT SERVICES | $1.6M | Apr 9, 2027 |
| 47QACA25F0267 | Dynamis, Inc. THE DEPARTMENT OF THE AIR FORCE INSPECTION AGENCY READINESS EXERCISE ADVANCED PLANNING EXECUTION AND REPORTING REAPER CAPSTONE TRAINING COURSE FOR THE DEPARTMENT OF THE AIR FORCE… | $2.6M | Sep 16, 2027 |
| 47QACA25F0304 | Deloitte Consulting LLP CDC- NCCDPHP, ORGANIZATIONAL AND CUSTOMER-CENTRIC TRANSFORMATION. | $33.0M | Sep 21, 2027 |
| 24322622F0218 | Deloitte Consulting LLP CDC-NCCDPHP, ORGANIZATIONAL AND CUSTOMER-CENTRIC TRANSFORMATION | $48.9M | Sep 21, 2027 |
| 47QACA26C0082 | Windsor Group LLC WPI CLASSIFICATION SURGE SUPPORT | $3.5M | Sep 28, 2027 |
| 24322622F0194 | Dynamis, Inc. DEPARTMENT OF THE AIR FORCE INSPECTION AGENCY READINESS EXERCISE ADVANCED PLANNING, EXECUTION, AND REPORTING (REAPER) CAPSTONE TRAINING COURSE FOR THE DEPARTMENT OF THE AIR FORCE… | $3.9M | Mar 16, 2028 |
Common questions
Who are the top OPM contractors for NAICS 541612?
In the latest 12 months, Deloitte Consulting LLP ($19.2M), Windsor Group LLC ($3.5M), Knowledgebank, Inc. ($1.5M) received the most OPM obligations for human resources consulting services (2007), human resources and executive search consulting services (2002).
How concentrated is this market?
The eight largest primes held 100.0% of positive obligations, and Deloitte Consulting LLP alone held 67.7%. 3 contractors won their first obligations in this market during the latest 12 months.
Are any large OPM NAICS 541612 contracts ending soon?
7 of the largest awards in this market reach their current end date in the next 18 months. The first is 47QACA25F0365 (Advent Svcs LLC, $3.1M obligated), ending Dec 28, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
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$17.5MFigures 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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