Process Design Engineer (Irvine)

Process Engineer EIT

Tetra Tech is seeking a motivated Process Engineer EIT to join our growing water treatment team, contributing to cutting-edge PFAS and large-scale water / wastewater infrastructure projects across the U.S. You'll work directly with nationally recognized process engineers and a highly collaborative team known for delivering innovative, technically sound solutions. If you're ready to build your technical foundation and grow your career in municipal infrastructure, this is the place to do it.

At Tetra Tech, we are Leading with Science to solve the world's most complex challenges. Our industry-leading experts in engineering and consulting are committed to driving positive change in communities around the world. For over 50 years, we have been at the forefront of innovation and sustainability. Today we stand as a market leader, offering cutting-edge solutions in water, environment, energy, and international development. Our work has improved more than 625 million lives around the world.

Join Tetra Tech to make a real difference. Our work leverages cutting-edge technologies, advanced analytics, and the expertise of world-class scientists and engineers to create meaningful change around the world. Discover your full potential join us to advance your career while leaving a lasting legacy.

As a Process Design Engineer, you'll gain hands-on experience supporting the planning and design of treatment systems for emerging contaminantsmost notably PFASalongside engineers who are shaping the future of municipal water. You'll collaborate with experienced professionals across disciplines and work closely with a leading technical voice in the industry, gaining insight and mentorship as you contribute to real projects. In this role you will :

• Support the delivery of large-scale water and wastewater treatment projects from planning through construction.
• Collaborate closely with multidisciplinary teams of civil, electrical, mechanical, and structural engineers.
• Execute the client's objectives by preparing construction drawings, specifications, cost estimates, technical reports, and permit packages.
• Assist with the preparation of design calculations, process modeling, and equipment sizing for PFAS treatment (e.g., GAC, IX, RO), filtration, disinfection, and other unit processes.
• Work closely with the team to prepare design calculations, system modeling, and hydraulic analyses for pipelines, pump stations, force mains, and collection systems.
• Engage in on-site investigations site visits, pilot testing, construction support, and client coordination, gaining firsthand experience in project delivery.

Learn from industry leaders and build a strong foundation for long-term career growth.

Qualifications :

CA Salary : $77,000- $95,000 dependent on experience

The perks of working at Tetra Tech include : comprehensive and market-competitive benefits, merit-based financial rewards, flexibility and company-wide commitment to work / life balance, collaborative team atmosphere that values the contributions of all employees, and learning and development opportunities for ongoing professional growth.

Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. 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.