Federal market intelligence · NAICS 561621

Security Systems Services

Who is winning security systems services work, at which agencies, and which contracts are coming up for recompete — from live SAM.gov and USAspending data. Updated continuously.

60Recent awards
$1.5BObligated (visible)
0Upcoming recompetes
Department of DefenseTop buyer

Top agencies buying NAICS 561621

Department of Defense$941.2M
Department of Homeland Security$225.8M
Department of Transportation$85.0M
Department of Justice$60.4M
Department of Energy$27.9M
Securities and Exchange Commission$26.6M

Leading incumbents

M. C. DEAN, INC.$206.1M
CACI INTERNATIONAL INC$149.0M
PARAGON SYSTEMS INC$148.2M
SERCO INC$137.2M
ADVANCED TECHNOLOGY SYSTEMS COMPANY, INC. (OF VIRGINIA)$113.1M
GENERAL DYNAMICS MISSION SYSTEMS, INC.$89.7M
KBR WYLE SERVICES, LLC$70.0M
XATOR LLC$62.5M

Upcoming recompetes in NAICS 561621

Incumbent contracts with a clock running — your earliest shot at a displacement.

Get the full Security Systems Services market report and weekly updates — free.

No spam. Unsubscribe anytime.
Win more in NAICS 561621

DSS Nexus scores every opportunity for you

Fit, win-probability, recompete radar, capture-to-proposal — the operating system small GovCon firms use to stop chasing the wrong bids.

Take the 2-minute guided tour →

Explore other markets