State + agency + NAICS page

Department of Defense NAICS 561621 contractors in Virginia

Security Systems Services (except Locksmiths). Use this deeper state-buyer-industry page to see which visible contractors sit closest to this exact overlap in the public AwardRegistry layer.

Virginia + Department of Defense
Last updated: April 8, 2026

Visible recipients

11

Mapped obligations

$2,071,992,518

Top PSC links

4

Top recipients

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

Serco INC

Herndon, VA

Serco INC is a federal category business profile based in Herndon, VA. The current public data layer shows $1,004,172,019 in visible federal obligations across 1,016 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.

$653,436,871

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.

$257,864,029

Triple Canopy INC

Herndon, VA

Triple Canopy INC is a federal category business profile based in Herndon, VA. The current public data layer shows $370,722,968 in visible federal obligations across 334 awards or transactions. Department of State 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.

$244,892,339

M. C. Dean, Inc.

Tysons, VA

M. C. Dean, Inc. is a federal category business profile based in Tysons, VA. The current public data layer shows $366,425,260 in visible federal obligations across 1,299 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 J058.

$721,375,070

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.

$41,449,827

Chenega Global Protection, LLC

Chantilly, VA

Chenega Global Protection, LLC is a federal 8a program participant profile based in Chantilly, VA. The current public data layer shows $187,152,746 in visible federal obligations across 377 awards or transactions. National Aeronautics and Space Administration 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.

$29,577,490

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.

$57,176,178

Chenega Security International California

Chantilly, VA

Chenega Security International California is a federal alaskan native corporation owned firm profile based in Chantilly, VA. The current public data layer shows $15,708,482 in visible federal obligations across 1 awards or transactions. Department of the Interior 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.

$2,180,404

Chenega Security International, LLC

Chantilly, VA

Chenega Security International, LLC is a federal 8a program participant profile based in Chantilly, VA. The current public data layer shows $14,093,569 in visible federal obligations across 28 awards or transactions. Department of Defense 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.

$40,270,100

Agency Management Concepts INC

Oakton, VA

Agency Management Concepts INC is a federal 8a program participant profile based in Oakton, VA. The current public data layer shows $2,993,604 in visible federal obligations across 5 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 561621 (Security Systems Services (except Locksmiths)). The profile also shows meaningful product and service activity in PSC N063.

$1,132,238
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