2011 Top 100
68: GTSI Corp.
| Top 100 Revenue: | $287,668,000 |
| Defense Revenue: | $129,273,000 |
| Civilian Revenue: | $158,395,000 |
| 2010 Revenue: | $666.7 million |
| 2010 Earnings: | Loss of $930,000 |
| 2009 Revenue: | $761.9 million |
| 2009 Earnings: | $5.5 million |
| Number of employees: | 433 |
| Headquarters: | Chantilly, Va. |
| Website: | www.gtsi.com |
| Leadership: | Sterling Philips |
| Ticker: | GTSI |
| Lines of business: | Data center, networking, client, security and IT service management |
| Major customers: | Army, Veterans Affairs Department, National Weather Service, Energy Department, NASA and Internal Revenue Service |
| Major contracts/projects: | N/A |