Senior Process Engineer, PE

The Opportunity

Tetra Tech is seeking a Senior Process Engineer (PE) with extensive experience in water and wastewater treatment process design to lead high-impact municipal and utility projects across Florida and beyond. From advanced treatment facility upgrades to PFAS mitigation and water reuse initiatives, you'll provide technical leadership on projects that protect public health, strengthen community infrastructure, and shape the future of water.

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 Senior Process Engineer serves as a technical leader responsible for the planning, evaluation, and process design of complex water and wastewater treatment facilities. This role leads process modeling, treatment optimization, equipment selection, pilot testing, regulatory coordination, and development of design documents for municipal and industrial infrastructure projects.

Working closely with project managers, discipline leads, and clients, the Senior Process Engineer provides technical oversight throughout the project lifecycle while ensuring designs are innovative, practical, and compliant with regulatory requirements. This individual also contributes to business development, proposal strategy, and the technical development of junior engineering staff.

Essential Job Functions

• Lead the process planning and design of municipal water and wastewater treatment facilities, including conventional treatment, biological nutrient removal, membrane systems, advanced oxidation, disinfection, residuals management, potable reuse, and emerging contaminant treatment such as PFAS, GAC, and ion exchange.
• Serve as the technical lead on multidisciplinary design teams from planning through construction support.
• Prepare and review process calculations, hydraulic analyses, process flow diagrams, P&IDs, design criteria, equipment sizing, technical memoranda, specifications, and engineering reports.
• Perform and oversee process modeling, treatment evaluations, and technology selection using industry-standard software and engineering principles.
• Lead pilot studies, facility assessments, condition evaluations, startup assistance, commissioning activities, and operational optimization efforts.
• Coordinate with civil, mechanical, electrical, structural, and instrumentation & controls engineers to develop integrated treatment facility designs.
• Provide technical quality assurance and quality control reviews for engineering deliverables.
• Collaborate directly with clients, regulatory agencies, and project stakeholders to develop practical, cost-effective treatment solutions.
• Support project managers with scope development, budgeting, scheduling, technical risk management, and project execution.
• Contribute to proposal preparation, technical interviews, project pursuits, and strategic business development efforts.
• Mentor junior engineers and technical staff through project guidance, design reviews, and professional development.

Required Qualifications

• Bachelor's degree in Civil, Environmental, Chemical, or related Engineering discipline.
• Registered Professional Engineer (PE).
• 10+ years of progressive experience in water and wastewater treatment process engineering.
• Demonstrated experience leading the process design of municipal treatment facilities through planning, detailed design, and construction.
• Strong background in advanced treatment technologies including membrane filtration, biological treatment, nutrient removal, PFAS treatment, GAC, ion exchange, or potable reuse.
• Experience preparing process calculations, hydraulic modeling, technical reports, equipment selection, and engineering specifications.
• Working knowledge of state and federal drinking water and wastewater regulations.
• Proven ability to lead multidisciplinary engineering teams and manage multiple concurrent projects.
• Strong client relationship, communication, and presentation skills.
• Experience supporting proposals, technical approaches, and project pursuits is preferred.
• Valid driver's license with a clean driving record.

Physical Requirements

• 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.

Work Environment/Environment Factors

• This position primarily operates in an office setting with hybrid flexibility.
• Occasional travel to project sites, client meetings, or field locations may be required.
• Site visits may involve exposure to outdoor weather conditions, construction sites, and active infrastructure environments.

Additional Information
This position offers a hybrid work schedule with flexibility to balance office collaboration and remote work.

Life at Tetra Tech

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.
• Learning and development opportunities for ongoing professional growth

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

X (Twitter): @TetraTechJobs

Additional Information

• Organization: 200 IEW