Lead, perform, and manage projects that include water and wastewater treatment, distribution and transmission mains, wastewater collection, trunk and force main, pumping stations, wells, storage tanks, civil grading, drainage, as well as rehabilitation of existing infrastructure. With 30,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition.