Medium Volume

NAICS 561621Security Systems Services (Except Locksmiths)

Size Standard

$29 million

CMMC Level

Level 1–2 (varies by contract)

Key Agencies

DoD, Army, Navy, Air Force

Overview

Establishments primarily engaged in selling, installing, monitoring, or servicing security alarm systems and devices such as burglar and fire alarms, locking devices, and access control systems. Defense applications include SCIF build-outs, intrusion detection systems, and physical security upgrades.

Common Contract Types

Access Control SystemsSCIF ConstructionIntrusion DetectionVideo Surveillance

Recent Contract Awards

Total Awards

31,594

Last 30 Days

26

30-Day Value

$19.1M

Avg Amount

$735K

All-Time Value

$9.7B

FPDS

ContractAwardeeAmount
DIGITRONICS, INC.$22K
JOHNSON CONTROLS SECURITY SOLUTIONS LLC$283K
JOHNSON CONTROLS SECURITY SOLUTIONS LLC$153K
AVALLONE ARCHITECTURAL SPECIALTIES, L.L.C.$114K
STAR COMMUNICATION INC.$714K
SKE SUPPORT SERVICES GMBH$40K
M. C. DEAN, INC.$5.3M
TROFHOLZ TECHNOLOGIES, INC.$77K
BIRDI SYSTEMS, INC.$8.1M
PER MAR SECURITY SERVICES$24K

Top Contractors (FPDS)

ContractorTotal Obligation
M. C. DEAN, INC.$727.2M
SERCO INC$716.0M
JOHNSON CONTROLS SECURITY SOLUTIONS LLC$667.4M
COVENANT AVIATION SECURITY, LLC$556.1M
OLGOONIK GLOBAL SECURITY, LLC.$397.4M

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Contracting Agencies

DoDArmyNavyAir ForceIntelligence CommunityDHS

Frequently Asked Questions

What CMMC level is required for NAICS 561621?

Level 1 for standard alarm installations. Level 2 when contracts involve SCIF security system design, classified space configurations, or access control databases that contain CUI.

What is the SBA size standard for NAICS 561621?

The size standard is $29 million in average annual receipts.

What SCIF-related work uses NAICS 561621?

Work includes SCIF intrusion detection system (IDS) installation, TEMPEST shielding verification, access control system programming, video surveillance installation, and Integration of physical security systems into government networks.

Working on this for real?

Knowing the code is the easy part. Getting your operation ready to win and deliver against it is the work.

  • See how the engagement works — the AI Integration Assessment: a sequenced, costed plan, $12,500, fixed scope.
  • Apply for an evaluation — we don't take every client. Qualified applications book instantly; pilots ($6,000–$45,000, one workflow in your boundary) are reviewed for strategic fit.
  • $12,500, fixed scope — credits in full against an implementation engagement.
  • Founder-led. A limited number of concurrent engagements.

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Related: how much CMMC certification costs — DoD’s own priced figures