State + NAICS + PSC page
NAICS 561611 and PSC R425 contractors in Maryland
Investigation and Personal Background Check Services. SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL. Use this deeper state cross-code page to see which visible contractors sit in the overlap between these two lanes inside Maryland.
Maryland · NAICS 561611 · PSC R425
Last updated: April 3, 2026
Visible recipients
1
Mapped obligations
$383,403,364
Buyer overlap
4
Top recipients
