2012 Top 100
82: Tetra Tech Inc.
| Top 100 Revenue: | $206,660,000 |
| Defense Revenue: | $75,746,000 |
| Civilian Revenue: | $130,914,000 |
| 2011 Revenue: | N/A |
| 2011 Earnings: | N/A |
| 2010 Revenue: | $2.2 billion |
| 2010 Earnings: | $76.8 million |
| Number of employees: | N/A |
| Headquarters: | Pasadena, Calif. |
| Website: | www.tetratech.com |
| Leadership: | N/A |
| Ticker: | N/A |
| Lines of business: | N/A |
| Major customers: | N/A |
| Major contracts/projects: | N/A |