38 : Professional Solutions
| Location: | Alexandria, Va. |
| Annual growth rate: | 72.9% |
| 2008 revenue: | $15,409,191 |
| 2007 revenue: | $9,964,353 |
| 2006 revenue: | $4,145,679 |
| 2005 revenue: | $3,517,270 |
| 2004 revenue: | $1,723,494 |
| Leadership: | Michael Dean, CEO |
| Number of employees: | 160 |
| Web site: | http://www.prosol1.com |