Agency + NAICS + PSC page

Department of Defense NAICS 561621 and PSC R425 contractors

Security Systems Services (except Locksmiths). SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. 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 R425
Last updated: April 8, 2026

Visible recipients

4

Mapped obligations

$2,046,555,791

State overlap

3

Top recipients

Visible recipients in the Department of Defense overlap of NAICS 561621 and PSC R425

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.

$1,625,493,048

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.

$350,667,010

Advanced It Concepts, LLC

Orlando, FL

Advanced It Concepts, LLC is a federal 8a program participant profile based in Orlando, FL. The current public data layer shows $19,005,268 in visible federal obligations across 18 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 541519 (Other Computer Related Services). The profile also shows meaningful product and service activity in PSC D399.

$35,728,780

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.

$34,666,953