Department of Defense NAICS 561621 contractors

Security Systems Services (except Locksmiths). Contractors in this NAICS lane under Department of Defense.

Agency: Department of Defense

Last updated: April 17, 2026

Visible recipients

Mapped obligations

$2,292,847,952

Visible recipients tied to Department of Defense and NAICS 561621

Muscogee Nation Business Enterprise

Okmulgee, OK

Okmulgee, OK | 20 awards | Top agency Department of Defense | NAICS 541519

$4,960,153

Olgoonik Solutions LLC

Anchorage, AK

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

$28,914,036

Advanced It Concepts, LLC

Orlando, FL

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

$8,830,674

Chenega Security International California

Chantilly, VA

Chantilly, VA | 1 awards | Top agency Department of the Interior | NAICS 561612

$2,180,404

Chenega Security International, LLC

Chantilly, VA

Chantilly, VA | 28 awards | Top agency Department of Defense | NAICS 561612

$40,270,100

Agency Management Concepts INC

Oakton, VA

Oakton, VA | 5 awards | Top agency Department of Defense | NAICS 561621

$1,132,238

Chenega Infinity, LLC

Chantilly, VA

Chantilly, VA | 20 awards | Top agency Department of Homeland Security | NAICS 561612

$22,637,972

Alutiiq Advanced Security Solutions LLC

Anchorage, AK

Anchorage, AK | 6 awards | Top agency Department of Homeland Security | NAICS 561612

$4,427,512

Alutiiq Business Services, LLC

Anchorage, AK

Anchorage, AK | 5 awards | Top agency Department of Defense | NAICS 611519

$46,168,307

M.c. Dean Europe Gmbh

Leinfelden-echterdingen

Leinfelden-echterdingen | 5 awards | Top agency Department of Defense | NAICS 335999

$129,832

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