Senior Water Project Engineer

At Mott Mac Donald, we trust our brilliant people to do brilliant things in engineering, management, and development services, supporting multisector project work in over 150 countries. As one of the largest employee-owned companies in the world, we pride ourselves on our ability to deliver exceptional outcomes through our network of 20,000+ talented consultants. With sustainability and innovation at the heart of all our sectors in North America, including, Buildings, Energy, Transportation, and Water.

We believe in empowering our people to excel, learn, and grow, offering diverse opportunities to contribute to career-defining work. Join us and be part of a collaborative environment where your ambitions are united with ours, and you can truly shape your story.

If you share that vision, even if you don’t meet every requirement listed, we’d still love to hear from you. We value potential and diverse perspectives as much as experience. Let’s explore how we can support your growth and help you take the next step in your career, while contributing to an exciting new chapter for Mott Mac Donald in North America.

Mott Mac Donald 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 modeling 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 modeling, 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 modeling 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 modeling 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 treatment plant planning and design
• Strong experience delivering projects through planning, design, and construction
• Proven Doer/Seller capability with experience supporting or leading:
• 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, Info Water
• Excel-based engineering tools
• Knowledge of Gulf Coast or Southeast U.S. utility clients and regulatory environments is a plus

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