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Department of Homeland Security NAICS 541990 and PSC R428 contractors
All Other Professional, Scientific, and Technical Services. SUPPORT- PROFESSIONAL: INDUSTRIAL HYGIENICS. Use this deeper buyer cross-code page to see which visible contractors sit in the overlap between these two lanes under Department of Homeland Security.
Department of Homeland Security · NAICS 541990 · PSC R428
Last updated: April 7, 2026
Visible recipients
1
Mapped obligations
$23,503,231
State overlap
1
Top recipients
