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NAICS 561621 market
NAICS 561621

NAICS 561621 contractors: Security Systems Services (except Locksmiths)

36 federal prime contractors list NAICS 561621 as their primary industry. Together they received $359.4M in prime contract obligations in the latest 12 months. The largest by obligations since FY2022 is Advanced Technology Systems Company, Inc. (of Virginia), and most are headquartered in Virginia, Maryland, and California.

All 36 contractors

Ranked by prime contract obligations since FY2022, across all their NAICS codes. Open a profile for top agencies, recent awards, and contracts ending soon.

NAICS 561621 contractors: Security Systems Services (except Locksmiths)
ContractorHeadquartersLatest 12 moSince FY2022
Advanced Technology Systems Company, Inc. (of Virginia)Virginia$71.3M$246.9M
Johnson Controls Security Solutions LLCVirginia$54.6M$196.4M
CACI International IncVirginia$33.5M$153.6M
Johnson Controls Building Automation Systems, LLCMaryland$23.4M$104.0M
Chenega Integrated Security Solutions, LLCVirginia$17.2M$70.7M
Scdatacom, LLCGeorgia$17.3M$70.4M
Hurtvet Subcontracting, Inc.Utah$20.0M$66.3M
Johnson Controls Fire Protection LPFlorida$8.4M$66.2M
Versar Security Systems, LLCDistrict of Columbia$7.0M$60.7M
Media Plumbing & Heating IncPennsylvania$11.0M$54.1M
Trofholz Technologies, Inc.California$6.2M$47.9M
Birdi Systems, Inc.California$7.6M$41.6M
itm4g LLCVirginia$5.9M$31.8M
Warfeather, LLCOklahoma$2.0M$31.0M
KBR Wyle Services, LLCMaryland$2.9M$29.8M
Veterans Fire and Life Safety CorporationMissouri$5.5M$29.6M
Electronic Systems Services IncTexas$5.5M$28.3M
Bowhead Protection & Security Services LLCVirginia$12.0M$21.5M
Indyne, IncFlorida$2.6M$21.0M
Electripro, Inc.Texas$4.7M$18.4M
Corelogix Consulting IncVirginia$2.1M$18.1M
Integrated Security Technologies Inc.Hawaii$3.4M$17.1M
HQE Systems, Inc.California$4.0M$17.1M
Mission Support Services, LLCWisconsin$0$16.5M
Systems Engineering IncVirginia$1.7M$15.8M
Total-Evergreen JV LLCWashington$3.4M$15.5M
Gonzales Consulting Services IncColorado$2.8M$14.8M
Concord Crossroads LLCVirginia$321K$14.2M
National Project Management LLCNorth Carolina$5.2M$14.0M
Optimum LOW Voltage LLCNorth Carolina$1.5M$12.9M
Condortech Services, Inc.Virginia$6.0M$12.8M
CMN, LLCArkansas$5.0M$11.7M
MA Impianti S.R.L.Outside the U.S.$2.6M$11.5M
j2 Associates, LLCNorth Carolina$603K$11.4M
Kastle Systems LLCVirginia$2.6M$11.1M
TIC Security, LLCMaryland−$460K$10.1M

Prime contract obligations from USAspending.gov through Oct 5, 2026. A contractor's primary NAICS is the code with the most obligations since FY2022. For the largest contractors in this NAICS by obligations under it, see the NAICS 561621 market page. To search by name, UEI, or CAGE code, use the contractor directory.

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