NAICS Industry Group 5616: Investigation and Security Services
Industry group
Definition
This industry group comprises establishments primarily engaged in one of the following: (1) investigation, guard, and armored car services; (2) selling security systems, such as burglar and fire alarms and locking devices, along with installation, repair, or monitoring services; or (3) remote monitoring of electronic security alarm systems.
Government contracts for this service: PSC S206 Security Guard Services
Code facts
- Part of
-
-
56
- 561
-
56
- Codes under it
- 2
- Contract awards
- 3,889 In the last 12 months
- Contract obligations
- $7,643,493,345 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau and contract spending from SAM.gov/FPDS.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $236,045,798 |
| FY2026 | $8,805,650,812 |
| FY2025 | $7,643,493,345 |
| FY2024 | $7,208,835,743 |
| FY2023 | $7,112,274,966 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Amentum Services, Inc. | $725,624,007 | |
| 2 | The GEO Group, Inc. | $648,110,424 | |
| 3 | Metropolitan Security Services, Inc. | $630,613,434 | |
| 4 | Corecivic, Inc. | $358,902,886 | |
| 5 | Caci, Inc. - Federal | $325,274,101 | |
| 6 | Paragon Systems Inc. | $324,662,941 | |
| 7 | Universal Protection Service, LIMITED Partnership | $317,558,400 | |
| 8 | Triple Canopy Inc. | $288,944,589 | |
| 9 | Peraton Risk Decision Inc. | $270,777,676 | |
| 10 | Akima Infrastructure Protection LLC | $239,082,946 |
See the full FY2025 ranking of NAICS 5616 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Homeland Security | $4,972,950,920 | |
| 2 | Department of State | $810,084,792 | |
| 3 | Administrative Office of the U.S. Courts | $719,943,418 | |
| 4 | Defense Counterintelligence and Security Agency | $507,043,716 | |
| 5 | Department of the Army | $344,177,377 | |
| 6 | Department of Justice | $310,426,621 | |
| 7 | Department of the Navy | $210,174,402 | |
| 8 | Department of Health and Human Services | $165,557,399 | |
| 9 | Air Force | $142,540,074 | |
| 10 | Department of Veterans Affairs | $141,093,952 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | S206 Guard Services | $6,284,575,002 | |
| 2 | R430 Support – Professional: Physical Security and Badging | $797,241,093 | |
| 3 | R615 Support – Administrative: Background Investigation | $669,832,233 | |
| 4 | R799 Other Management Support Services | $221,333,683 | |
| 5 | R499 Other Professional Services | $213,411,288 | |
| 6 | 6350 Miscellaneous Alarm, Signal, and Security Detection Systems | $174,808,235 | |
| 7 | J059 Maintenance, Repair and Rebuilding of Equipment: Electrical and Electronic Equipment Components | $92,026,864 | |
| 8 | N063 Installation of Equipment: Alarm, Signal, and Security Detection Systems | $90,507,082 | |
| 9 | J063 Maintenance, Repair and Rebuilding of Equipment: Alarm, Signal, and Security Detection Systems | $87,306,119 | |
| 10 | V999 Other Transportation Travel and Relocation Services | $78,817,385 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Texas | $1,297,608,557 | |
| 2 | Virginia | $1,135,291,007 | |
| 3 | California | $913,789,584 | |
| 4 | Florida | $657,951,602 | |
| 5 | Tennessee | $618,422,147 | |
| 6 | District of Columbia | $542,949,207 | |
| 7 | Maryland | $333,728,409 | |
| 8 | New York | $206,981,997 | |
| 9 | Alaska | $155,361,962 | |
| 10 | Colorado | $146,465,040 | |
| 11 | Georgia | $127,227,745 | |
| 12 | Michigan | $123,927,212 | |
| 13 | New Jersey | $122,563,409 | |
| 14 | Washington | $118,672,298 | |
| 15 | Missouri | $95,823,620 | |
| 16 | Arizona | $94,850,151 | |
| 17 | Pennsylvania | $94,200,142 | |
| 18 | Utah | $89,824,583 | |
| 19 | Massachusetts | $86,078,055 | |
| 20 | Illinois | $56,018,991 | |
| 21 | North Carolina | $51,039,039 | |
| 22 | Alabama | $49,771,278 | |
| 23 | Louisiana | $47,209,238 | |
| 24 | Kansas | $43,231,517 | |
| 25 | Minnesota | $42,724,978 | |
| 26 | Ohio | $41,922,257 | |
| 27 | New Mexico | $41,891,187 | |
| 28 | Puerto Rico | $41,101,375 | |
| 29 | Hawaii | $36,234,891 | |
| 30 | South Carolina | $26,624,043 | |
| 31 | Oregon | $25,766,510 | |
| 32 | Mississippi | $24,624,084 | |
| 33 | Montana | $23,601,916 | |
| 34 | Kentucky | $23,227,746 | |
| 35 | Oklahoma | $20,461,485 | |
| 36 | West Virginia | $19,709,842 | |
| 37 | South Dakota | $17,678,585 | |
| 38 | Indiana | $15,140,977 | |
| 39 | Nevada | $14,721,249 | |
| 40 | Arkansas | $10,244,023 | |
| 41 | Wisconsin | $9,971,127 | |
| 42 | Connecticut | $9,857,117 | |
| 43 | Idaho | $8,818,815 | |
| 44 | Rhode Island | $6,641,565 | |
| 45 | Nebraska | $6,366,559 | |
| 46 | New Hampshire | $6,010,525 | |
| 47 | Iowa | $3,983,281 | |
| 48 | Guam | $3,915,220 | |
| 49 | Maine | $3,703,372 | |
| 50 | North Dakota | $3,393,408 | |
| 51 | Vermont | $2,371,009 | |
| 52 | Delaware | $1,151,257 | |
| 53 | Wyoming | $975,741 | |
| 54 | U.S. Virgin Islands | $457,562 | |
| 55 | Northern Mariana Islands | $105,228 |
Show all 55
Shares are of everything obligated under NAICS 5616 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 39 more
Latest 49 of 23,866 listed here. See the rest on GovTribe.
Codes under 5616
Quick answers
What is NAICS 5616?
NAICS 5616 is Investigation and Security Services, an industry group in NAICS 56, Administrative and Support and Waste Management and Remediation Services.
What codes are under NAICS 5616?
NAICS 5616 has 2 codes under it with their own GovTribe pages: 56161 Investigation, Guard, and Armored Car Services and 56162 Security Systems Services.
How much do federal agencies spend under NAICS 5616?
Federal contracts under NAICS 5616 obligated $7,643,493,345 in fiscal year 2025 and $31,006,300,664 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 5616?
The contractors with the most obligated under NAICS 5616 in fiscal years 2026 and 2027 are Amentum Services, Inc. ($725,624,007); The GEO Group, Inc. ($648,110,424); and Metropolitan Security Services, Inc. ($630,613,434).
Which agencies buy the most under NAICS 5616?
The agencies that obligated the most under NAICS 5616 in fiscal years 2026 and 2027 are Department of Homeland Security ($4,972,950,920), Department of State ($810,084,792) and Administrative Office of the U.S. Courts ($719,943,418).
Which PSC codes are used with NAICS 5616?
The PSC codes with the most obligated under NAICS 5616 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 5616 performed?
By place of performance, the states with the most contract obligations under NAICS 5616 over the last 12 months are Texas ($1,297,608,557), Virginia ($1,135,291,007) and California ($913,789,584).
What is the latest contract opportunity under NAICS 5616?
The latest contract opportunity under NAICS 5616 is Lenel OnGuard system with LenelS2 physical security solutions, special notice from Naval Sea Systems Command (Navy), posted November 12, 2026.
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