NAICS and NIGP Codes
(mapped to DC Work Divisions)
Division 1 – General Requirements
NIGP 9184200 – Engineering Consulting
→ NAICS 541330 – Engineering ServicesNIGP 9187550 – Management Consulting Services
→ NAICS 541611 – Administrative Management & General Management Consulting ServicesNIGP 9250000 – Engineering Services, Professional
→ NAICS 541330 – Engineering Services
Division 13 – Special Construction
NIGP 9599056 – Construction and Design Services, Modular T-Shape Fishing Pier
→ NAICS 237990 – Other Heavy and Civil Engineering Construction
Division 15 – Mechanical
NIGP 9252200 – Control Systems Engineering
→ NAICS 541330 – Engineering Services
Division 16 – Electrical
NIGP 7255400 – Security Systems and Equipment, Communications
→ NAICS 561621 – Security Systems Services (Except Locksmiths)NIGP 8383400 – Communication Security Systems
→ NAICS 561621 – Security Systems ServicesNIGP 9203700 – Networking Services
→ NAICS 541512 – Computer Systems Design ServicesNIGP 9252900 – Electric Utility Protection and Control Engineering
→ NAICS 541330 – Engineering Services
Primary NAICS Codes:
541330 – Engineering Services
541611 – Management Consulting
541512 – Computer Systems Design
561621 – Security Systems Services
237990 – Other Heavy and Civil Engineering Construction