Professional Services Companies in Pennsylvania: 73 Verified Firms
Secwyn has verified 73 professional services companies based in Pennsylvania. The largest groups are Engineering Services (23); Temporary Help Services (18); and Employment Placement Agencies (9). By headcount, 78% have 51–200 employees, 17% have 201–500 employees, and 6% fall in other size bands. Size is not yet confirmed for 1. Philadelphia has the most (13), followed by Pittsburgh (8) and Cranberry (3). Of the 25 whose customers we could confirm, 80% sell to businesses and 12% to consumers.
Company size
- 11–50 employees3 · 4%
- 51–200 employees56 · 77%
- 201–500 employees12 · 16%
- 501–1,000 employees1 · 1%
- Size not confirmed1 · 1%
Who they sell to, among the 25 companies where we could confirm it: businesses 80%, consumers 12%, government 36%. A company can sell to more than one.
Top cities
- Philadelphia13 · 18%
- Pittsburgh8 · 11%
- Cranberry3 · 4%
- Harrisburg3 · 4%
Cities with fewer than 3 companies are not listed.
Largest sub-industries
| Sub-industry | NAICS | Companies |
|---|---|---|
| Engineering Services | 541330 | 23 |
| Temporary Help Services | 561320 | 18 |
| Employment Placement Agencies | 561311 | 9 |
| Architectural Services | 541310 | 8 |
| Landscaping Services | 561730 | 6 |
| Executive Search Services | 561312 | 2 |
| Administrative Management and General Management Consulting Services | 541611 | 1 |
| Environmental Consulting Services | 541620 | 1 |
A sample of these companies
A few of the 73 professional services companies in Pennsylvania. Names, websites and contacts are shown after you sign up.
Company #1 · name shown after sign-up
Employment Placement Agencies · 51–200 employees
Company #2 · name shown after sign-up
Architectural Services · 51–200 employees · Philadelphia
Company #3 · name shown after sign-up
Engineering Services · 201–500 employees · Philadelphia
Company #4 · name shown after sign-up
Offices of Certified Public Accountants · 51–200 employees · Pittsburgh
Company #5 · name shown after sign-up
Landscaping Services · 51–200 employees
Company #6 · name shown after sign-up
Administrative Management and General Management Consulting Services · 51–200 employees · Philadelphia
Find the Pennsylvania 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.