NAICS 54 — Professional, Scientific, and Technical Services

Understanding Sector 54

NAICS sector 54 is one of 20 industry sectors defined by the North American Industry Classification System. The federal government uses these codes to classify contract requirements, determine small business eligibility, and track procurement spending across industries. When a federal agency issues a solicitation, they assign a NAICS code that best describes the principal purpose of the acquisition — this determines the applicable size standard for small business participation.

The codes below are sorted by total federal spending, with the highest-spend industries at the top. Click any code to view detailed spending data, top contractors, and guidance on competing for contracts in that industry.

Six-Digit Codes in Sector 54

• What is NAICS sector 54?

  NAICS sector 54 covers Professional, Scientific, and Technical Services. Establishments that specialize in performing professional, scientific, and technical activities for others. It contains 51 six-digit industry codes used in federal procurement.

• How much does the federal government spend in sector 54?

  Total federal contract spending across all codes in the Professional, Scientific, and Technical Services sector is approximately $229,939,631,404. Individual codes within the sector range from the most active at $52.3B to smaller niche markets.

• How do NAICS sectors relate to size standards?

  Each six-digit NAICS code has its own SBA size standard — sectors don't have a single standard. Size standards are expressed either as maximum average annual receipts (e.g., $41.5 million) or maximum number of employees (e.g., 500 employees). Click into any six-digit code to see its specific size standard.