NAICS + PSC page

NAICS 561621 and PSC R499 contractors

Security Systems Services (except Locksmiths). SUPPORT- PROFESSIONAL: OTHER. Use this cross-code page to see which visible federal contractors sit in the overlap between these two public category lanes.

NAICS 561621 + PSC R499
Last updated: April 3, 2026

Visible recipients

5

Mapped obligations

$5,749,491,229

State overlap

0

Top recipients

Visible recipients in the NAICS 561621 and PSC R499 overlap

Serco INC

Herndon, VA

Serco INC is a federal category business profile based in Herndon, VA. The current public data layer shows $1,006,141,546 in visible federal obligations across 1,029 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541330 (Engineering Services). The profile also shows meaningful product and service activity in PSC R499.

$4,819,761,653

Paragon Systems INC

Herndon, VA

Paragon Systems INC is a federal category business profile based in Herndon, VA. The current public data layer shows $533,359,903 in visible federal obligations across 692 awards or transactions. Department of Homeland Security appears as the strongest visible awarding agency. Top industry concentration is in NAICS 561612 (Security Guards and Patrol Services). The profile also shows meaningful product and service activity in PSC S206.

$458,308,346

Centerra Group, LLC

Herndon, VA

Centerra Group, LLC is a federal category business profile based in Herndon, VA. The current public data layer shows $305,938,174 in visible federal obligations across 143 awards or transactions. Department of Energy appears as the strongest visible awarding agency. Top industry concentration is in NAICS 561612 (Security Guards and Patrol Services). The profile also shows meaningful product and service activity in PSC S206.

$187,594,995

Siemens Government Technologies INC

Arlington, VA

Siemens Government Technologies INC is a federal category business profile based in Arlington, VA. The current public data layer shows $111,989,171 in visible federal obligations across 227 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541512 (Computer Systems Design Services). The profile also shows meaningful product and service activity in PSC N059.

$182,273,844

Olgoonik Solutions LLC

Anchorage, AK

Olgoonik Solutions LLC is a federal 8a program participant profile based in Anchorage, AK. The current public data layer shows $17,123,797 in visible federal obligations across 76 awards or transactions. Department of State appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541690 (Other Scientific and Technical Consulting Services). The profile also shows meaningful product and service activity in PSC R499.

$101,552,391