Department of Defense NAICS 561621 and PSC 9905 contractors

Security Systems Services (except Locksmiths). SIGNS, ADVERTISING DISPLAYS, AND IDENTIFICATION PLATES. Use this deeper buyer cross-code page to see which visible contractors sit in the overlap between these two lanes under Department of Defense.

Department of Defense · NAICS 561621 · PSC 9905

Last updated: April 3, 2026

Visible recipients

Mapped obligations

$263,405,376

State overlap

Top recipients

Visible recipients in the Department of Defense overlap of NAICS 561621 and PSC 9905

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.

$263,405,376