Professional Services Companies by State: 1,937 Verified US Firms
Secwyn has verified 1,937 professional services companies across 50 states. California (215), Texas (205), and Florida (129) have the most. The largest groups nationwide are Temporary Help Services (623); Engineering Services (457); and Employment Placement Agencies (318). By headcount, 72% have 51–200 employees, 19% have 201–500 employees, and 9% fall in other size bands. Size is not yet confirmed for 30. The 14 states below hold 1,348 of them; each has its own page.
Professional Services companies by state
589 more companies are spread across other states. A state gets its own page once it has enough verified companies.
Largest sub-industries
- Temporary Help Services623 · 32%
- Engineering Services457 · 24%
- Employment Placement Agencies318 · 16%
- Architectural Services205 · 11%
- Landscaping Services123 · 6%
- Executive Search Services44 · 2%
- Janitorial Services23 · 1%
- Other Services to Buildings and Dwellings21 · 1%
Company size
- 11–50 employees45 · 2%
- 51–200 employees1,378 · 71%
- 201–500 employees355 · 18%
- 501–1,000 employees127 · 7%
- 1,001–5,000 employees1 · 0%
- 5,000+ employees1 · 0%
- Size not confirmed30 · 2%
See which professional services companies fit what you sell
Describe what you sell and Secwyn shows the companies most likely to buy it, with the reasons for each match. Sign up free and your first 3 company reveals are on us: name, website, description with its source, contact channels and the roles to contact.
How Secwyn verifies these companies
- Every company description is a sentence visible on the company's own website. Inside the product, each one links to its source page.
- Each company has a NAICS industry code, the US government standard for classifying businesses.
- All companies are based in the United States. Location and size come from public sources, including company filings and People Data Labs.
Data updated October 6, 2026.