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NAICS 561621 and PSC R425 contractors

Security Systems Services (except Locksmiths). SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. Cross-code contractor overlap.

NAICS 561621 + PSC R425

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$2,051,002,816

State overlap

Top recipients

Visible recipients in the NAICS 561621 and PSC R425 overlap

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

Olgoonik Solutions LLC

Anchorage, AK

Anchorage, AK | 77 awards | Top agency Department of State | NAICS 541690

Advanced It Concepts, LLC

Orlando, FL

Orlando, FL | 18 awards | Top agency Department of Defense | NAICS 541519

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