2018 Top 100
53: Tetra Tech Inc.
| Top 100 Revenue: | $378,784,000 |
| Defense Revenue: | $79,122,000 |
| Civilian Revenue: | $299,662,000 |
| 2017 Revenue: | N/A |
| 2017 Earnings: | N/A |
| 2016 Revenue: | N/A |
| 2016 Earnings: | N/A |
| 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 |