All Other Business Support Services

Professional employment and staffing services not otherwise classified.

NAICS 561499 · Sector 56: Administrative and Support and Waste Management and Remediation Services

By Outrider Editorial Team · Updated October 7, 2026

SBA size standard

$21.5 million

Measured by average annual receipts over the last 5 fiscal years

SBA table effective March 2023

FY2025 federal spending

The Department of Veterans Affairs bought 71% of the $548.7M obligated under 561499 in FY2025.

Contract awards
1,147
Contract vehicles (IDVs)
81

Top buying agencies

  1. Department of Veterans Affairs$388.3M
  2. Department of Defense$74.2M
  3. Department of the Treasury$22.2M
  4. Department of Health and Human Services$11.5M
  5. Department of Agriculture$10.8M

FY2025 federal contract obligations, USAspending.gov

All Other Professional Employment Services (NAICS 561499) is a catch-all for professional staffing and employment services not classified elsewhere. This includes specialized staffing for professional and technical positions.

What Businesses Fall Under This Code

561499 includes specialized staffing agencies, professional placement services, and employment services for specific professional categories. In government, this might include staffing for specialized professional roles not captured by standard IT staffing codes.

SBA Size Standard and What It Means

The SBA size standard for 561499 is $21.5 million in average annual receipts. With average annual receipts of $21.5 million or less, you count as a small business on contracts filed under this code.

Federal Spending in This Category

Federal specialized professional staffing spending varies based on agency needs for unique professional skills.

Top Agencies Buying in This Code

All federal agencies procure specialized professional staffing based on mission needs. Staffing spending is distributed across agencies.

Tips for Tech Companies Using This Code

Use 561499 if you provide specialized professional staffing outside standard IT categories. Show expertise in identifying and placing professionals with specialized skills needed by federal agencies.

Pro Tip: If you're a staffing company, 561320 is typically more appropriate for IT staffing. Use 561499 as secondary code for specialized professional placements outside IT.

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