Top DoD investigation and personal background check services contractors
In the 12 months ending Oct 5, 2026, the Department of Defense obligated $386.1M in net prime contract dollars under NAICS 561611, down 32.8% from $574.3M in the preceding 12 months. 29 prime contractors received positive obligations, and 2 of them accounted for 80% of that spend.
Prime contracts funded by the Department of Defense. Latest 12 months: Oct 6, 2025 to Oct 5, 2026. Source: USAspending.gov.
DoD publishes contract data to USAspending with a 90-day delay, so the most recent months understate DoD activity.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top DoD contractors for NAICS 561611
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 | CACI, Inc. - Federal | $165.9M | $231.4M | 42.9% | ▲ 1 |
| 2 | Peraton Risk Decision Inc. | $143.7M | $271.9M | 37.2% | ▼ 1 |
| 3 | Asrc Federal Administrative Services, LLC | $42.3M | $0 | 10.9% | New |
| 4 | Iworks Corp | $16.5M | $16.9M | 4.3% | — |
| 5 | Ruchman and Associates, Inc. | $4.9M | $2.2M | 1.3% | ▲ 4 |
| 6 | Capital Center for Credibility Assessment Corporation | $3.8M | $8.5M | 1.0% | ▼ 1 |
| 7 | Asrc Federal Professional Services, LLC | $2.7M | $21.1M | 0.7% | ▼ 4 |
| 8 | Chenega Naswik International LLC | $1.9M | $3.1M | 0.5% | ▼ 1 |
| 9 | Connexus Hub Inc. | $1.6M | $1.5M | 0.4% | ▲ 3 |
| 10 | Equifax Workforce Solutions LLC | $1.1M | $2.2M | 0.3% | — |
| 11 | Nemean Solutions, LLC | $954K | $2.0M | 0.3% | — |
| 12 | Idemia Identity & Security USA LLC | $306K | $102K | 0.1% | ▲ 10 |
| 13 | Advanced EEO Solutions LLC | $244K | $462K | 0.1% | ▲ 3 |
| 14 | Mantech Advanced Systems International, Inc. | $210K | $208K | 0.1% | ▲ 4 |
| 15 | Echelon Services, LLC | $124K | $120K | 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
- Asrc Federal Administrative Services, LLC$0 → $42.3M (+$42.3M) · now #3
- Ruchman and Associates, Inc.$2.2M → $4.9M (+$2.7M) · now #5
- Serco Inc−$276K → $0 (+$276K) · no latest-period obligations
Largest declines
- Peraton Risk Decision Inc.$271.9M → $143.7M (−$128.2M) · now #2
- CACI, Inc. - Federal$231.4M → $165.9M (−$65.4M) · now #1
- Asrc Federal Professional Services, LLC$21.1M → $2.7M (−$18.4M) · now #7
New to this market
2 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Asrc Federal Administrative Services, LLC | Jan 30, 2026 | $42.3M |
| biometrics4all, LLC | May 29, 2026 | $15K |
Where the money comes from
Funding sub-agencies within the Department of Defense, 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 |
|---|---|---|---|
| Defense Counterintelligence and Security Agency | $372.5M | $543.6M | Down $171.1M (31.5%) |
| Department of the Navy | $5.5M | $10.0M | Down $4.5M (45.2%) |
| Office of the Inspector General | $4.9M | $5.0M | Down $153K (3.0%) |
| U.S. Cyber Command | $2.0M | $0 | New |
| Department of the Army | $1.1M | $3.4M | Down $2.4M (68.5%) |
| Department of the Air Force | $501K | $8.6M | Down $8.1M (94.2%) |
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 |
|---|---|---|---|
| HS002126CE004 | Asrc Federal Administrative Services, LLC CASE PROCESSING OPERATIONS CENTER (CPOC) SUPPORT SERVICES | $42.3M | Oct 31, 2026 |
| HS002126CE011 | Iworks Corp PERSONNEL SECURITY SUPPORT SERVICES (PS3) | $8.0M | Nov 4, 2026 |
| N6426724C0032 | Chenega Naswik International LLC SPECIAL SECURITY SUPPORT SERVICES | $2.2M | Feb 4, 2027 |
| M0026425P0022 | Connexus Hub Inc. MCCOG SPECIAL SECURITY OFFICE SUPPORT SERVICES | $3.1M | Mar 10, 2027 |
| HS002123F0019 | Peraton Risk Decision Inc. TASK ORDER FOR BACKGROUND FIELDWORK INVESTIGATIVE PRODUCTS | $783.0M | Mar 31, 2027 |
| HS002123F0020 | CACI, Inc. - Federal TASK ORDER FOR BACKGROUND INVESTIGATION FIELDWORK SERVICES. | $765.1M | Mar 31, 2027 |
| HS002123F0047 | Equifax Workforce Solutions LLC EMPLOYMENT VERIFICATION SERVICES | $6.3M | May 31, 2027 |
| N6426725C2001 | Chenega Naswik International LLC SPECIAL SECURITY SUPPORT SERVICES | $3.2M | Jun 8, 2027 |
| N0018926FW198 | Capital Center for Credibility Assessment Corporation FCC POLYGRAPH SUPPORT TASK ORDER | $1.5M | Jun 28, 2027 |
Common questions
Who are the top DoD contractors for NAICS 561611?
In the latest 12 months, CACI, Inc. - Federal ($165.9M), Peraton Risk Decision Inc. ($143.7M), Asrc Federal Administrative Services, LLC ($42.3M) received the most DoD obligations for investigation and personal background check services.
How concentrated is this market?
The eight largest primes held 98.7% of positive obligations, and CACI, Inc. - Federal alone held 42.9%. 2 contractors won their first obligations in this market during the latest 12 months.
Are any large DoD NAICS 561611 contracts ending soon?
9 of the largest awards in this market reach their current end date in the next 18 months. The first is HS002126CE004 (Asrc Federal Administrative Services, LLC, $42.3M obligated), ending Oct 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
NAICS 561611 across all agencies
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$50.3MHHS · NAICS 561611
$34.0MSSA · NAICS 561611
$24.7MUSDA · NAICS 561611
$12.6MVA · NAICS 561611
$11.6MState Department · NAICS 561611
$7.2MTreasury · NAICS 561611
$6.9MFigures 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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