Senior Water Project Engineer

At Mott Mac Donald, 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 Mac Donald, 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 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 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…