2026 Top 100
| Top 100 Revenue: | $501,216,000 |
| Defense Revenue: | $102,244,000 |
| Civilian Revenue: | $398,972,000 |
| 2025 Revenue: | $5.4B |
| 2025 Earnings: | $247.9M |
| 2024 Revenue: | $5.2 billion |
| 2024 Earnings: | N/A |
| Number of employees: | N/A |
| Headquarters: | Pasadena, California |
| Website: | https://www.tetratech.com/ |
| Leadership: | Roger Argus, CEO and president; Steven Burdick, CFO, Leslie Shoemaker, chief innovation and sustainability officer; Preston Hopson, chief legal and human capital offier; William Brownlie, chief engineer; Brian Carter, controller and chief accounting officer; Craig Christensen, CIO; Richard Lemmon, SVP, administration; Brendan O'Rourke, SVP, enterprise risk management; Jeremy Travis, president, government services group; Craig Hatch, president, Europe and UK division; Olivier Jeannot, president, federal IT; Lauren Springer, president U.S. infrastructure division, Meegan Sullivan, president, Asia Pacific division; David Bohmann, president, environment/geotech division; Jonathan Weiss, president, commercial/international group, president Energy engineering division |
| Ticker: | TTEK |
| Lines of business: | One Water, data center solutions, defense services, digital systems, disaster and emergency management, environment, high performance buildings, PFAS management, power and energy, solid waste, strategic communications |
| Major customers: | FAA, State, Army, EPA, Energy |
| Major contracts/projects: | https://www.tetratech.com/contracts/ |
