NAICS and NIGP Codes

(mapped to DC Work Divisions)

Division 1 – General Requirements

  • NIGP 9184200 – Engineering Consulting
    NAICS 541330 – Engineering Services

  • NIGP 9187550 – Management Consulting Services
    NAICS 541611 – Administrative Management & General Management Consulting Services

  • NIGP 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 Services

  • NIGP 9203700 – Networking Services
    NAICS 541512 – Computer Systems Design Services

  • NIGP 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