NAICS 56161: Investigation, Guard, and Armored Car Services

NAICS industry

Code facts

Codes under it
3
Contract awards
2,630 In the last 12 months
Contract obligations
$6,857,433,235 In FY2025

NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.

Contract obligations by fiscal year

Fiscal year Obligated
FY2027 To date $138,137,973
FY2026 $7,934,858,855
FY2025 $6,857,433,235
FY2024 $6,400,333,055
FY2023 $6,344,708,983

Top contractors by obligations

Rank Contractor Obligated, FY2026–FY2027 Share
1 Amentum Services, Inc. $725,164,325
2 The GEO Group, Inc. $648,110,424
3 Metropolitan Security Services, Inc. $628,064,315
4 Corecivic, Inc. $358,902,886
5 Universal Protection Service, LIMITED Partnership $317,554,539
6 Paragon Systems Inc. $288,118,005
7 Triple Canopy Inc. $268,606,004
8 Caci, Inc. - Federal $258,423,939
9 Akima Infrastructure Protection LLC $239,082,946
10 Gardaworld Federal Services LLC $214,543,558

See the full FY2025 ranking of NAICS 56161 contractors, by parent company.

Top funding agencies by obligations

Rank Agency Obligated, FY2026–FY2027 Share
1 Department of Homeland Security $4,817,899,710
2 Department of State $797,397,721
3 Administrative Office of the U.S. Courts $687,106,763
4 Defense Counterintelligence and Security Agency Department of Defense $372,492,569
5 Department of the Army Department of Defense $265,973,376
6 Department of Justice $254,588,757
7 Department of Health and Human Services $156,631,166
8 National Aeronautics and Space Administration $90,074,988
9 Department of Veterans Affairs $87,581,770
10 Department of Energy $68,927,875
Rank PSC code Obligated, FY2026–FY2027 Share
1 S206 Guard Services $6,105,538,988
2 R430 Support – Professional: Physical Security and Badging $738,069,136
3 R615 Support – Administrative: Background Investigation $540,831,781
4 R799 Other Management Support Services $221,179,963
5 R499 Other Professional Services $181,117,545
6 V999 Other Transportation Travel and Relocation Services $73,461,183
7 Y1AA Construction of Office Buildings $65,418,777
8 M1FF Operation of Penal Facilities $17,588,346
9 R408 Program Management/Support Services $17,140,720
10 R710 Support – Management: Financial $13,492,286

Contract obligations by state

Rank Place of performance Obligated, last 12 months Share
1 Texas $1,256,802,036
2 Virginia $882,721,150
3 California $759,291,042
4 Florida $636,027,759
5 Tennessee $619,088,534
6 District of Columbia $532,847,354
7 Maryland $302,010,745
8 New York $227,111,115
9 Alaska $150,329,893
10 Colorado $134,733,782
11 New Jersey $121,428,603
12 Georgia $119,547,341
13 Missouri $112,923,310
14 Washington $108,026,984
15 Michigan $105,487,265
16 Pennsylvania $98,723,110
17 Arizona $90,598,647
18 Utah $88,066,416
19 Massachusetts $51,847,806
20 New Mexico $51,253,444
21 North Carolina $50,499,323
22 Illinois $49,920,565
23 Louisiana $46,091,147
24 Minnesota $44,547,778
25 Alabama $44,413,209
26 Puerto Rico $41,680,546
27 Kansas $40,329,847
28 Ohio $39,757,711
29 Hawaii $25,427,315
30 Oregon $25,344,955
31 Mississippi $23,946,281
32 Kentucky $22,699,984
33 Montana $20,792,366
34 West Virginia $18,448,391
35 Oklahoma $16,915,727
36 South Carolina $14,613,733
37 Nevada $11,813,667
38 South Dakota $11,804,598
39 Indiana $11,233,041
40 Connecticut $9,756,741
41 Arkansas $8,323,290
42 Wisconsin $8,228,943
43 Idaho $8,070,862
44 New Hampshire $5,527,623
45 Rhode Island $5,012,414
46 Nebraska $4,960,002
47 Iowa $3,699,136
48 Maine $3,365,392
49 Vermont $2,203,898
50 Guam $1,817,251
51 Delaware $1,742,062
52 North Dakota $1,621,406
53 Wyoming $582,767
54 U.S. Virgin Islands $341,605
55 Northern Mariana Islands $108,000
Show all 55

Shares are of everything obligated under NAICS 56161 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.

Contract opportunities

Notice Posted Due
Multiple Award Schedule Award Notice · Federal Acquisition Service · 47QSMD20R0001
S206--Unarmed Security Guards at the SLVHCS POP: 12/20/2026 - 12/19/2027 4 Option Years POC: Christopher Rossi Pre-Solicitation · Veterans Integrated Service Network 16 (VHA)
S206--691 | North Campus Security Staffing | PoP: 05/14/2027 - 12/31/2028 Pre-Solicitation · Veterans Integrated Service Network 22 (VHA)
Notice of Intent to Single Source- Construction Surveillance Technicians Special Notice · Pacific Air Forces (USAF)
Security Services at Davis and Parker Dams Pre-Solicitation
Local Guard Forces US Mission Dhaka, Bangladesh Award Notice · Office of Acquisition Management —
Local Guard Forces U. S. Mission Santiago, Chile Award Notice · Office of Acquisition Management —
Security Guard Services Wilkes-Barre VAMC CBOCs Award Notice · Veterans Integrated Service Network 4 (VHA) —
Local Guard Services U. S. Mission Guatemala City, Guatemala Pre-Solicitation · Office of Acquisition Management
Cleared American Guards(CAGs)and Construction Surveillance Technicians (CSTs) Pre-Solicitation · Office of Acquisition Management
Forensic Polygraph services Solicitation · Administrative Office of the U.S. Courts
R430--Unarmed Security Guards, 11/01/2026 - 10/31/2027, 508C75732 Award Notice · Veterans Integrated Service Network 7 (VHA) —
Justification For Exception to Fair Opportunity - Global Protective Services (GPS) Erbil, Iraq Limited / Sole Source Justification · ACC Rock Island —
Batavia Detention Infrastructure Limited / Sole Source Justification · Immigration and Customs Enforcement —
Armed Protective Security Services - IRS Campus in Austin, TX Pre-Solicitation · Office of Procurement Operations
Regional security operation services for naval district washington Limited / Sole Source Justification · Naval Facilities Engineering Command (Navy) —
Level II-Armed Protective Security Officers Indiana Solicitation · Federal Emergency Management Agency
Parma cboc security services Award Notice · Veterans Integrated Service Network 10 (VHA) —
S206--Unarmed Security Guard Contract Award Notice · Veterans Integrated Service Network 16 (VHA) —
Protective Security Officer Services, Los Angeles Area Solicitation · Office of Procurement Operations
Amendment 0003 unarmed security services jesse brwon VAMC and cbocs Special Notice · Veterans Integrated Service Network 12 (VHA)
R430--BASE - Security Guards Services for the Milwaukee VAMC & CBOCs 695C70014 - UCD 09-30-2031 Award Notice · Veterans Integrated Service Network 12 (VHA) —
U. S. Mission Italy Award Notice · Office of Acquisition Management —
Ground Transportation & Facility Guard Services Arizona and California Special Notice · Customs and Border Protection
Amendment 0002 36C25227Q0011_1 unarmed security services jesse brown VAMC and cbocs Special Notice · Veterans Integrated Service Network 12 (VHA)
Fingerprinting Services Special Notice · Naval Air Warfare Center (NAVAIR)
R430--Fire Guard Services for SAVAHCS POP: 09/01/2026 - 08/31/2029 Award Notice · Veterans Integrated Service Network 22 (VHA) —
Sources Sought - U. S. Mission South Africa IDIQ Pre-Solicitation · Office of Acquisition Management
Fingerprinting Services Special Notice · Naval Air Warfare Center (NAVAIR)
Amendment 0001 - unarmed security services jesse brown VAMC and cbocs Special Notice · Veterans Integrated Service Network 12 (VHA)
INSCOM G-2 Access Control and Security Escorts (ACES) Solicitation · ACC Warren
Fairbanks Alaska CBOC Security Guard Solicitation · Veterans Integrated Service Network 20 (VHA)
Fingerprinting Services Special Notice · Naval Air Warfare Center (NAVAIR)
Multiple Award Schedule Award Notice · Federal Acquisition Service · 47QSMD20R0001
Fingerprinting Services Award Notice · Defense Health Agency · HT001126CE032 —
Pre-Solicitation - U. S. Mission Lilongwe, Malawi Pre-Solicitation · Office of Acquisition Management
Background Screening for Volunteers and Cadets Solicitation · Coast Guard
Protective Security Officer (PSO) Services Limited / Sole Source Justification · Office of Procurement Operations —
USPS EEO Final Agency Decision Services - September 2026 Solicitation Solicitation · United States Postal Service
Local Guard Forces U. S. Mission San Jose, Costa Rica Pre-Solicitation · Office of Acquisition Management
Guard Hours Increase Limited / Sole Source Justification · Immigration and Customs Enforcement —
Unarmed security services jesse brwon VAMC and cbocs Solicitation · Veterans Integrated Service Network 12 (VHA)
Fingerprinting Services Solicitation · Naval Air Warfare Center (NAVAIR) · N0042126Q1355-rev
Sources Sought - U. S. Mission Maseru, Lesotho Pre-Solicitation · Office of Acquisition Management
Fingerprinting Services Solicitation · Naval Air Warfare Center (NAVAIR) · N0042126Q1355
WJHTC Armed Security Guard Services Solicitation · Technical Center (FAA)
Multiple Award Schedule Award Notice · Federal Acquisition Service · 47QSMD20R0001
Construction Site Security Monitoring for AFSOC Hotel, Yokota Air Base, Japan Pre-Solicitation · ENDIST Japan (USACE)
Show 38 more

Latest 48 of 8,203 listed here. See the rest on GovTribe.

Codes under 56161

NAICS code Size standard
561611 Investigation and Personal Background Check Services $25 million in average annual receipts
561612 Security Guards and Patrol Services $29 million in average annual receipts
561613 Armored Car Services $43 million in average annual receipts

Definition

This industry comprises establishments primarily engaged in providing one or more of the following: (1) investigation, detective, and personal background check services; (2) guard and patrol services; and (3) picking up and delivering money, receipts, or other valuable items with personnel and equipment to protect such properties while in transit.

Quick answers

What is NAICS 56161?

NAICS 56161 is Investigation, Guard, and Armored Car Services, a NAICS industry in NAICS 56, Administrative and Support and Waste Management and Remediation Services.

What codes are under NAICS 56161?

NAICS 56161 has 3 codes under it with their own GovTribe pages: 561611 Investigation and Personal Background Check Services, 561612 Security Guards and Patrol Services and 561613 Armored Car Services.

How much do federal agencies spend under NAICS 56161?

Federal contracts under NAICS 56161 obligated $6,857,433,235 in fiscal year 2025 and $27,675,472,102 in fiscal years 2023 through 2027.

Who are the largest contractors under NAICS 56161?

The contractors with the most obligated under NAICS 56161 in fiscal years 2026 and 2027 are Amentum Services, Inc. ($725,164,325); The GEO Group, Inc. ($648,110,424); and Metropolitan Security Services, Inc. ($628,064,315).

Which agencies buy the most under NAICS 56161?

The agencies that obligated the most under NAICS 56161 in fiscal years 2026 and 2027 are Department of Homeland Security ($4,817,899,710), Department of State ($797,397,721) and Administrative Office of the U.S. Courts ($687,106,763).

Which PSC codes are used with NAICS 56161?

The PSC codes with the most obligated under NAICS 56161 in fiscal years 2026 and 2027 are S206 Guard Services, R430 Support – Professional: Physical Security and Badging and R615 Support – Administrative: Background Investigation.

Where is the work under NAICS 56161 performed?

By place of performance, the states with the most contract obligations under NAICS 56161 over the last 12 months are Texas ($1,256,802,036), Virginia ($882,721,150) and California ($759,291,042).

What is the latest contract opportunity under NAICS 56161?

The latest contract opportunity under NAICS 56161 is Multiple Award Schedule, award notice from Federal Acquisition Service, posted October 22, 2026.

On GovTribe

See everything under NAICS 56161

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