Process Engineer -PE

The Opportunity

Tetra Tech is seeking a Process Engineer (PE) with hands‑on experience in water and wastewater treatment process design to support high‑impact municipal and utility projects across Florida and beyond. From treatment plant upgrades to emerging contaminant solutions, you’ll contribute to the work that protects public health and strengthens community resilience.

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.

The Process Engineer plays a key technical role in the planning, evaluation, and design of water and wastewater treatment facilities. This position supports process modeling, treatment optimization, equipment selection, pilot testing, and development of detailed design documents. Working alongside multidisciplinary engineers and project managers, the Process Engineer ensures high‑quality, cost‑effective solutions that meet regulatory requirements, operational needs, and client expectations. The ideal candidate brings strong technical fundamentals, curiosity, and the desire to grow into a future technical leader within our Water practice.

• Supports the process design of water and wastewater treatment facilities, including coagulation/filtration, biological treatment, disinfection, residuals handling, advanced treatment, and emerging contaminant removal (e.g., PFAS, GAC, IX).

• Prepares and reviews calculations, technical memoranda, process flow diagrams, hydraulic profiles, design criteria, equipment sizing, and design reports.

• Contributes to the development of construction drawings and specifications in collaboration with civil, mechanical, electrical, and I&C discipline teams.

• Performs process modeling and evaluation using industry‑standard tools and data‑driven methods.

• Participates in pilot studies, field investigations, facility assessments, and startup/testing support.

• Coordinates with project managers, discipline leads, and clients to ensure technical alignment and timely delivery of project milestones.

• Provides quality review of deliverables to maintain Tetra Tech’s standards for technical excellence.

• Supports proposal preparation, technical approach development, and level‑of‑effort estimates for new work pursuits.

• Mentors early‑career staff by sharing knowledge, reviewing work, and fostering technical growth.

• Bachelor’s degree in Civil, Environmental, Chemical, or related Engineering discipline.

• Registered Professional Engineer (PE).

• 3+ years of experience in water or wastewater process design, facility planning, or treatment system evaluation.

• Experience developing design calculations, process schematics, equipment sizing, and technical reports.

• Familiarity with regulatory requirements related to drinking water and/or wastewater treatment.

• Ability to work collaboratively with multidisciplinary teams and manage priorities across multiple projects.

• Strong written and verbal communication skills.

• Valid driver’s license and clean driving record.

• While performing the duties of this position, the employee may be required to:

• Sit, stand, and use standard office equipment for extended periods.

• Lift and carry up to 25 pounds occasionally.

• Walk on uneven terrain and navigate active construction sites safely.

• This position primarily operates in an office setting with hybrid flexibility.

• Occasional travel to…