Wastewater Treatment Engineer Jobs in Tennessee

About us

At Gresham Smith, we call it Genuine Ingenuity. Our culture is the cornerstone of who we are, and our people are at the heart of everything we do. United by our Core Purpose—to plan, design, and consult to create healthy and thriving communities—we deliver innovative solutions for life’s essential infrastructure and institutions.

What sets us apart is our dedication to care for our people, our clients, and the places we call home. We are more than a team of professionals—we’re a community built on commitment, integrity, respect, and teamwork.

Why Gresham Smith?

When you join Gresham Smith, you’re joining a place where you can connect and thrive. Our employees consistently recognize us as a Best Place to Work because we go above and beyond to ensure that you feel valued, supported, and empowered.

About You

We’re looking for someone who has:

• Bachelor’s degree in Environmental, Civil, or Chemical Engineering (Master’s preferred).
• Professional Engineer (P.E.) license in applicable Southeastern states.
• 10+ years of experience with a primary focus on municipal water and wastewater treatment facility design.
• Strong knowledge of process design principles, equipment selection, and regulatory compliance.
• Proficiency with Microsoft Office; working knowledge of AutoCAD and process modeling software (e.g., BioWin, GPS-X) preferred.
• Excellent written and verbal communication skills, including the ability to work collaboratively across teams and with clients.

Most importantly, you bring genuine curiosity, creativity, and a collaborative spirit—someone who wants to do great work with great people.

About the Role

You will focus on delivering high-impact projects for municipal and industrial clients across the Southeast. This role offers the opportunity to lead the planning, design, and implementation of water and wastewater treatment facilities that help our clients meet regulatory challenges, improve system reliability, and plan for future growth. You’ll work alongside a multidisciplinary team of engineers and designers dedicated to technical excellence, client service, and advancing sustainable infrastructure solutions.

As a Water/Wastewater Treatment Engineer, you will:

• Lead the planning and design of municipal water and wastewater treatment facilities, including plant upgrades, expansions, and regulatory-driven improvements.
• Prepare and review process designs, technical calculations, drawings, specifications, and cost estimates for treatment projects.
• Apply sound engineering judgment in selecting and optimizing unit processes, including physical processes, chemical treatment, biological processes, disinfection, and solids handling.
• Conduct and/or manage process modeling and analysis using tools such as BioWin or similar platforms to support design decisions.
• Prepare and review planning and design-level technical reports, including alternative analyses, basis of design reports, and technical memoranda in support of design decisions.
• Support construction-phase services, including reviewing submittals, responding to RFIs, and participating in startup and commissioning activities.
• Collaborate with internal and external multidisciplinary teams (civil, electrical, structural, mechanical) to deliver fully coordinated design packages.
• Serve as a technical mentor to junior staff and contribute to strong, long-term client relationships.

Your work will directly contribute to shaping environments where people live, work, and thrive, all while growing your career within a supportive, people-first culture.

Join Us

If you’re excited to bring your talents to a collaborative, people-first environment where you can make an impact while growing your career, we’d love to hear from you.

Here’s what you can expect:

Professional Growth: In-house Learning, Tuition Reimbursement, Licensure Support, Professional Organization Engagement.

Culture that Cares: 93% of employees say they feel cared for, and 96% are confident in our future success.

Competitive Benefits:

• Flexible Schedules & Generous PTO
• Healthcare (Medical, Dental, Vision, Wellness Programs)
• 401(k) with Company Match
• Short- & Long-term Disability, Paid Life & AD&D
• Supplemental, Critical Care, Pet, Legal & ID Theft Insurance
• Family Planning and Parental Leave
• Mass/Public Transit Program
• Telemedicine and Employee Assistance Program

Gresham Smith is an equal opportunity employer and does not discriminate. Everyone is invited to apply!

GRESHAM SMITH does not accept unsolicited resumes from recruiters, headhunters, search firms, or agencies. No referral or recruiter fees will be paid without a fully executed GRESHAM PLACEMENT SERVICES AGREEMENT (PSA) in advance. Submissions made without a PSA may be recruited and hired by GRESHAM SMITH with no financial obligation to the submitting party. Any such unsolicited resumes or candidate information sent to hiring managers or any employee becomes the property of GRESHAM SMITH.