Senior Water Project Engineer

At Mott MacDonald, we are driven by purpose and powered by brilliant people. As a trusted engineering, management, and development consultancy, we work with clients to solve complex challenges and deliver sustainable outcomes that make a meaningful difference for the communities we serve.

When you join us as an experienced professional, you will bring your expertise to work that matters while continuing to grow your career. You will collaborate with talented colleagues across disciplines and geographies, contribute your perspective, and help shape better outcomes through technical excellence, innovation, and integrity.

Build on your experience while helping shape what comes next. At Mott MacDonald, you'll work alongside talented people on complex and rewarding projects that make a real difference. We value fresh perspectives, encourage collaboration, and provide opportunities to expand your skills, take on new challenges, and grow your career. Whether you're deepening your technical expertise, broadening your leadership experience, or exploring new opportunities across our business, you'll be supported by a team that is committed to helping you succeed.

Mott MacDonald is seeking an accomplished Senior Water Engineer to join our established water sector team in New Orleans, Louisiana. This role is ideal for a senior technical professional who combines deep expertise in water modelling and treatment plant design with a strong ability to develop client relationships and win work.

You will play a key role in leading and delivering complex municipal water infrastructure projects while actively supporting business development, proposal leadership, and client engagement across the Gulf Coast and broader U.S. market. Projects will include water treatment plants, pumping and conveyance systems, hydraulic modelling, and resiliency-focused infrastructure.

Responsibilities will include:

• Leading and delivering planning, design, and construction-phase services for municipal water infrastructure projects, with emphasis on water distribution modelling and water treatment plant design
• Serving as a technical lead and project manager on multi-disciplinary water projects of moderate to high complexity
• Acting as a Doer/Seller, supporting business development through:




• Client relationship management
• Opportunity identification and pursuit strategy
• Proposal preparation and technical interviews




• Performing and overseeing hydraulic and water quality modelling for distribution systems and treatment processes
• Leading the development and review of:




• Technical memoranda and reports
• Design drawings and specifications
• Basis of design documents
• Engineer's opinions of probable construction cost




• Providing technical oversight for process design including conventional and advanced water treatment technologies
• Reviewing and approving engineering calculations and model results prepared by junior staff
• Coordinating with internal disciplines, subconsultants, utilities, and regulatory agencies
• Supporting construction administration activities including submittal review, RFIs, and field observations
• Mentoring and developing junior and mid-level engineers
• Supporting field investigations, condition assessments, and data collection efforts

We invite applications from candidates with the following experience:

• B.S. degree in Civil, Environmental, or Chemical Engineering (M.S. preferred)
• Licensed Professional Engineer (PE); ability to obtain Louisiana PE if not currently licensed
• 10+ years of progressive experience in municipal water engineering
• Demonstrated expertise in:




• Water distribution system modelling
• Water treatment plant planning and design




• Strong experience delivering projects through planning, design, and construction
• Proven Doer/Seller capability with experience supporting or leading:




• Client engagement
• Proposal development
• Business development activities




• Experience mentoring engineers and leading technical teams
• Strong written and verbal communication skills, including client-facing presentations
• Proficiency with industry-standard software such as:




• WaterGEMS, WaterCAD, InfoWater
• AutoCAD, Civil 3D, MicroStation
• Excel-based engineering tools




• Knowledge of Gulf Coast or Southeast U.S. utility clients and regulatory environments is a plus.

Bring your expertise, curiosity, and drive to make a difference. If you are ready to join a collaborative consultancy where your perspective is valued, your growth is supported, and you are empowered to lead with integrity, we would love to hear from you.

Benefits & Rewards

Individual pay is determined based on several factors such as work location, education, experience, and unique skills.

In addition to base salary, Mott MacDonald offers performance-based bonuses and a comprehensive benefits package, giving employees a direct connection to our success.

Our comprehensive benefits package is designed to support the health, wellbeing, financial security, and professional growth of our employees. Eligible employees have access to medical, dental, and vision coverage, FSA and HSA accounts, company-paid life insurance, short-term and long-term disability coverage, and a competitive 401(k) plan with company matching. We also provide paid time off, paid holidays, caregiver leave, employee referral bonuses, professional registration and membership reimbursements, and tuition assistance to support continued learning and career development.

Collaboration at Our Core

At Mott MacDonald, we believe great ideas happen when we're together. Our hybrid approach centers on an in-office culture, with most of your time spent collaborating face-to-face and a minimum of three days per week in the office. We balance flexibility with connection, so you and your manager can choose how to meet clients, team, and personal commitments.

Equal opportunity is the law.

We seek to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they have the opportunity to contribute.

• English version
• Spanish Version
• Chinese version

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, protected veteran status, creed, marital status, sexual orientation, gender identity, citizenship status or disability status.