19 : Concept Solutions LLC
| Location: | Reston, Va. |
| Annual growth rate: | 114.1% |
| 2008 revenue: | $10,487,130 |
| 2007 revenue: | $8,397,692 |
| 2006 revenue: | $5,666,928 |
| 2005 revenue: | $3,335,263 |
| 2004 revenue: | $499,188 |
| Leadership: | Phong Mai, president and CEO |
| Number of employees: | 70 |
| Web site: | http://www.concept-solutions.com |