2006 Top 100
72: Tetra Tech Inc.
| Top 100 Revenue: | $120,886,524 |
| Defense Revenue: | $46,929,255 |
| Civilian Revenue: | $73,957,269 |
| 2005 Revenue: | $1.3 billion |
| 2005 Earnings: | Loss of $99.5 million |
| 2004 Revenue: | $1.4 billion |
| 2004 Earnings: | $23.3 million |
| Number of employees: | 7,500 |
| Headquarters: | Pasadena, Calif. |
| Website: | www.tetratech.com |
| Leadership: | Sam W. Box, president and Dan L. Batrack, director, CEO and COO |
| Ticker: | N/A |
| Lines of business: | Resource management, infrastructure, communications and security |
| Major customers: | Navy, Federal Aviation Administration, Missile Defense Agency and Army |
| Major contracts/projects: | Tetra Tech has $101 million contract with the Missile Defense Agency for information management, engineering, workforce management support, administrative services, facility operations and logistics. The agency has been a Tetra Tech client since 1998. |