INVESTIGATION SERVICES
Explore federal contractors and contract awards classified under NAICS 561611. This industry code covers investigation services services and products in federal procurement.
Total Obligations
$2.3B
Lifetime contract value
Top Agencies
10
Buying in this NAICS
States Active
15
With contractors
Top Contractors in NAICS 561611
Highest-volume contractors by total obligations
No contractor data available.
View all contractors in this NAICSTop Buying Agencies
Federal agencies awarding contracts in NAICS 561611 (FY2025)
- 1Department of Justice959 awards
- 2General Services Administration371 awards
- 3Department of Homeland Security333 awards
- 4Department of State290 awards
- 5Department of Defense241 awards
- 6Department of the Treasury70 awards
- 7Department of Agriculture69 awards
- 8Department of Health and Human Services68 awards
- 9Department of Commerce58 awards
- 10Social Security Administration58 awards
Contractors by State
Distribution of NAICS 561611 contractors across states
Browse all statesRelated NAICS Codes
Other codes in the same industry group
SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS)
1,736 contractors
SECURITY GUARDS AND PATROL SERVICES
972 contractors
LOCKSMITHS
161 contractors
ARMORED CAR SERVICES
61 contractors
Recent Contract Awards
Latest contract transactions in NAICS 561611
Unknown Recipient
Department of Justice
SC | Dec 4, 2025
$650
Unknown Recipient
Department of Justice
TX | Dec 4, 2025
$-8K
Unknown Recipient
Department of Justice
PR | Dec 4, 2025
$200
Unknown Recipient
General Services Administration
| Dec 4, 2025
$0
Unknown Recipient
General Services Administration
| Dec 4, 2025
$0
Unknown Recipient
Department of Homeland Security
DC | Dec 4, 2025
$-1.01
Unknown Recipient
General Services Administration
| Dec 3, 2025
$0
Unknown Recipient
Department of Homeland Security
DC | Dec 3, 2025
$4K
Unknown Recipient
Securities and Exchange Commission
TX | Dec 3, 2025
$-13K
Unknown Recipient
Federal Communications Commission
VA | Dec 3, 2025
$0
Find Opportunities in NAICS 561611
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