NAICS 541990 and PSC B509 contractors

All Other Professional, Scientific, and Technical Services. SPECIAL STUDIES/ANALYSIS- ENDANGERED SPECIES: PLANT/ANIMAL. Use this cross-code page to see which visible federal contractors sit in the overlap between these two public category lanes.

NAICS 541990 + PSC B509

Last updated: April 7, 2026

Visible recipients

Mapped obligations

$77,661,355

State overlap

Top recipients

Visible recipients in the NAICS 541990 and PSC B509 overlap

Everfox LLC

Herndon, VA

Everfox LLC is a federal category business profile based in Herndon, VA. The current public data layer shows $72,572,047 in visible federal obligations across 89 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 611420 (Computer Training). The profile also shows meaningful product and service activity in PSC DA10.

$77,661,355