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Home/Virginia/Department of Defense/NAICS 561621/PSC R425

State + agency + NAICS + PSC page

Department of Defense NAICS 561621 and PSC R425 contractors in Virginia

Security Systems Services (except Locksmiths). SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. Deepest cross-filter overlap.

Virginia · Department of Defense

Last updated: April 8, 2026

Visible recipients

2

Mapped obligations

$1,976,160,058

Cross-code depth

4 filters

Top recipients

Visible recipients tied to Department of Defense, Virginia, NAICS 561621, and PSC R425

Serco INC

Herndon, VA

Herndon, VA | 1,016 awards | Top agency Department of Defense | NAICS 541330

Siemens Government Technologies INC

Arlington, VA

Arlington, VA | 227 awards | Top agency Department of Defense | NAICS 541512

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Top recipient paths -- ranked view
Department of Defense NAICS 561621 -- drop PSC filter
Department of Defense PSC R425 -- drop NAICS filter