General Services Administration NAICS 488999 contractors

All Other Support Activities for Transportation. Use this buyer-scoped industry page to see which visible contractors sit closest to this NAICS lane under General Services Administration.

Agency: General Services Administration

Last updated: April 8, 2026

Visible recipients

Mapped obligations

$722,202,503

Visible recipients tied to General Services Administration and NAICS 488999

Mantech Advanced Systems International, Inc.

Herndon, VA

Mantech Advanced Systems International, Inc. is a federal category business profile based in Herndon, VA. The current public data layer shows $878,752,678 in visible federal obligations across 684 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 R425.

$722,202,503