2010 Top 100
60: Tetra Tech Inc.
| Top 100 Revenue: | $381,344,102 |
| Defense Revenue: | $138,628,834 |
| Civilian Revenue: | $242,715,268 |
| 2009 Revenue: | $2.3 billion |
| 2009 Earnings: | $87 million |
| 2008 Revenue: | $2.1 billion |
| 2008 Earnings: | $60.9 million |
| Number of employees: | 10,000 |
| Headquarters: | Pasadena, Calif. |
| Website: | www.tetratech.com |
| Leadership: | Dan L. Batrack, chairman, president and CEO |
| Ticker: | N/A |
| Lines of business: | Environmental consulting services, technical support services, engineering and architecture services and remediation and construction management |
| Major customers: | Defense Department, Navy, Army, National Science Foundation, Federal Aviation Administration and U.S. Agency for International Development |
| Major contracts/projects: | Tetra Tech is working on a $51 million contract to provide information technology support services to the National Science Foundation. Tetra Tech has provided information technology support, proprietary applications development and other data management services to the NSF since 2003. |