NAICS 541990 and PSC G099 contractors

All Other Professional, Scientific, and Technical Services. SOCIAL- OTHER. Use this cross-code page to see which visible federal contractors sit in the overlap between these two public category lanes.

NAICS 541990 + PSC G099

Last updated: April 8, 2026

Visible recipients

Mapped obligations

$263,717,802

State overlap

Top recipients

Visible recipients in the NAICS 541990 and PSC G099 overlap

Amentum National Security Programs, INC

Chantilly, VA

Amentum National Security Programs, INC is a federal category business profile based in Chantilly, VA. The current public data layer shows $402,038,105 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 541990 (All Other Professional, Scientific, and Technical Services). The profile also shows meaningful product and service activity in PSC R499.

$263,717,802