Professional Services Companies in Colorado: 53 Verified Firms
Secwyn has verified 53 professional services companies based in Colorado. The largest groups are Engineering Services (14); Temporary Help Services (12); and Employment Placement Agencies (10). By headcount, 77% have 51–200 employees, 15% have 201–500 employees, and 8% fall in other size bands. Denver has the most (18), followed by Englewood (5) and Boulder (4).
Company size
- 11–50 employees2 · 4%
- 51–200 employees41 · 77%
- 201–500 employees8 · 15%
- 501–1,000 employees2 · 4%
Top cities
- Denver18 · 34%
- Englewood5 · 9%
- Boulder4 · 8%
- Fort Collins3 · 6%
- Golden3 · 6%
- Grand Junction3 · 6%
Cities with fewer than 3 companies are not listed.
Largest sub-industries
| Sub-industry | NAICS | Companies |
|---|---|---|
| Engineering Services | 541330 | 14 |
| Temporary Help Services | 561320 | 12 |
| Employment Placement Agencies | 561311 | 10 |
| Landscaping Services | 561730 | 5 |
| Architectural Services | 541310 | 4 |
| Environmental Consulting Services | 541620 | 1 |
| Executive Search Services | 561312 | 1 |
| Landscape Architectural Services | 541320 | 1 |
A sample of these companies
A few of the 53 professional services companies in Colorado. Names, websites and contacts are shown after you sign up.
Company #1 · name shown after sign-up
Temporary Help Services · 51–200 employees
Company #2 · name shown after sign-up
Other Accounting Services · 201–500 employees · Denver
Company #3 · name shown after sign-up
Engineering Services · 201–500 employees · Denver
Company #4 · name shown after sign-up
Employment Placement Agencies · 51–200 employees
Company #5 · name shown after sign-up
Landscaping Services · 51–200 employees · Fort Collins
Company #6 · name shown after sign-up
Office Administrative Services · 51–200 employees · Denver
Find the Colorado professional services companies that 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.