Halfaker & Associates

North American Industry Classification System (NAICS) Codes

• 541330 - Engineering Services
• 541513 - Computer Facilities Management Services
• 541611 - Administrative Management and General Management Consulting Services
• 541618 - Other Management Consulting Services
• 541690 - Other Scientific and Technical Consulting Services
• 561110 - Office Administrative Services
• 561410 - Document Preparation Services
• 561421 - Telephone Answering Services
• 561422 - Telemarketing Bureaus
• 561499 - All Other Business Support Services
• 561612 - Security Guards and Patrol Services
• 561920 - Convention and Trade Show Organizers
• 561990 - All Other Support Services (Visitors, Conventions, Meetings)