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Department of Defense NAICS 561621 and PSC R499 contractors

Security Systems Services (except Locksmiths). SUPPORT- PROFESSIONAL: OTHER. 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 R499
Last updated: April 8, 2026

Visible recipients

10

Mapped obligations

$6,233,906,938

State overlap

2

Top recipients

Visible recipients in the Department of Defense overlap of NAICS 561621 and PSC R499

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.

$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

Alutiiq Global Solutions, LLC

Anchorage, AK

Alutiiq Global Solutions, LLC is a federal alaskan native corporation owned firm profile based in Anchorage, AK. The current public data layer shows $208,315,787 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 236220 (Commercial and Institutional Building Construction). The profile also shows meaningful product and service activity in PSC Y199.

$47,596,770

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.

$197,510,999

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 $17,097,482 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

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.

$4,360,808

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.

$60,897,343

Alutiiq Business Services, LLC

Anchorage, AK

Alutiiq Business Services, LLC is a federal alaskan native corporation owned firm profile based in Anchorage, AK. The current public data layer shows $735,659 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 611519 (Other Technical and Trade Schools). The profile also shows meaningful product and service activity in PSC R499.

$174,049,789