Process Project Engineer

The Opportunity

Join Tetra Tech's Water Team in Irvine, CA, and help shape the future of municipal and regional water systems across Southern California. As a Process Engineer - Project Engineer, you'll be part of a dynamic group designing and delivering advanced treatment solutions, including PFAS treatment systems, large-scale water treatment facilities, and complex rehabilitation projects. This is an ideal opportunity for a licensed engineer ready to deepen technical expertise, contribute to innovative water projects, and take the next step toward project leadership.

Why Tetra Tech

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.

Your Impact

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.

Position Summary :

The Process Engineer - Project Engineer will support the planning, design, and implementation of water and wastewater treatment projects. The role requires strong technical and analytical skills, attention to detail, and an enthusiasm for problem-solving within a collaborative, client-focused environment. This position offers the opportunity to grow into project management and technical leadership roles within Tetra Tech's expanding water practice.

Essential Job Functions :

The following duties are considered essential to the role. Reasonable accommodations may be made to enable individuals with disabilities to perform these essential functions.

• Lead or support process design for advanced water and wastewater treatment systems, including PFAS, GAC, ion exchange (IX), RO, filtration, and disinfection processes.
• Participate in facility planning, alternatives analysis, and conceptual design for public sector treatment and infrastructure projects.
• Develop design calculations, process modeling, equipment sizing, and system layouts.
• Prepare engineering reports, technical memoranda, construction drawings, specifications, and cost estimates.
• Collaborate with project managers and senior engineers to deliver projects on time, within budget, and to the highest technical standards.
• Support construction-phase activities, including responding to RFIs, reviewing submittals, and conducting field observations.
• Participate in pilot testing, startup assistance, and site inspections as needed.
• Contribute to client meetings, presentations, and progress updates to communicate findings and recommendations.
• Work collaboratively across disciplines to develop innovative, sustainable treatment solutions.
• Mentor junior staff and contribute to internal knowledge-sharing initiatives.

Required Qualifications :

Preferred Qualifications :

Physical Requirements :

Work Environment / Environmental Factors :

Life at Tetra Tech :

The perks of working at Tetra Tech include :

About Tetra Tech :

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.

Tetra Tech is proud to be an Equal Opportunity Employer. All qualified candidates will be considered without regard to race, color, religion, national origin, age, disability, sexual orientation, gender identity, status as a protected veteran, or any other characteristic protected by law. Tetra Tech is a VEVRAA federal contractor and we request priority referral of veterans.

We invite applications from all interested parties.

Explore our open positions at https : / / www.tetratech.com / careers. Follow us on social media to learn more about our people, culture, and opportunities :

LinkedIn : @TetraTechCareers

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