li>Ability to develop a good working knowledge of flame-ionization detectors, photo-ionization detectors, explosive gas detectors, water level detectors, PH/temperature/conductivity meters, LFG analyzers (GEM/Envision) and other typical environmental monitoring equipment. With 25,000 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.