Possible NAICS Codes
561612 – Security Guards and Patrol Services
561621 – Security Systems Services (except Locksmiths)
922120 – Police Protection
334290 – Other Communications Equipment Manufacturing
561210 – Facilities Support Services
541990 – All Other Professional, Scientific, and Technical Services
541611 – Administrative Management and General Management Consulting Services
541519 – Other Computer Related Services
541690 – Other Scientific and Technical Consulting Services