Project Engineer - Water/Wastewater

Job Description

At Mott MacDonald, 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 MacDonald in North America.

Mott MacDonald is seeking an experienced Project Engineer ready to take the next step into a leadership position within the Water industry. This position is based in our New Orleans office and is critical to expanding Mott MacDonald’s technical capabilities to better serve our local municipal water and wastewater clients. As a Project Engineer, you will work on projects across our East Unit Water Market, supporting design and delivery of linear water infrastructure and plant-specific improvements.

We’re looking for someone with a strong background in municipal water engineering, whether in linear systems (water mains, sewer lines) or treatment plant design, who is client-focused and eager to grow. This role provides an opportunity to play a key part in expanding Mott MacDonald’s water market in Louisiana while contributing to major water and wastewater projects across North America.

Responsibilities include:

• Lead technical design efforts for linear water infrastructure and plant-related improvements, including calculations, plans, and specifications.
• Perform hydraulic modeling, water quality analysis, and prepare design reports.
• Support project managers in delivering projects on time and within budget.
• Provide construction administration (CE&I) support, including RFIs, submittal reviews, and field observations.
• Collaborate with municipal clients such as SWBNO and Jefferson Parish, ensuring compliance with local standards.
• Contribute to proposals, scopes, schedules, and cost estimates.
• Coordinate with multidisciplinary teams and adhere to QA/QC protocols.

We are looking for candidates who are passionate about sustainable, community-driven water solutions and want to help expand Mott MacDonald’s water market in Louisiana while supporting major projects across North America. If this describes you, apply today to launch your career at Mott MacDonald. We invite applications from candidates with the following experience:.

Required Experience

• Licensed Professional Engineer (PE) in Louisiana (or ability to obtain within 6 months).
• Minimum 4 years of experience in water/wastewater infrastructure design.
• Proficiency in AutoCAD/Civil 3D; familiarity with hydraulic modeling tools (e.g., WaterGEMS, InfoWater).
• Strong understanding of municipal water and sewer system design standards.
• Excellent communication and teamwork skills.

Preferred Experience

• Previous work with Sewerage and Water Board of New Orleans (SWBNO) or Jefferson Parish projects.
• Familiarity with Gulf Coast municipal standards and permitting processes.
• Experience with linear water projects and/or plant-specific improvements.
• Exposure to construction administration (CE&I) for water/wastewater projects.
• Ability to contribute to proposals and client-facing deliverables.

Benefits & Reward

At Mott MacDonald, our employees have a stake and a voice in our business, providing them with a direct connection to our success through our personal and group performance bonuses. We provide a comprehensive benefit package that includes 401k, medical, dental and vision insurance, short-term/long-term disability, paid holidays, PTO, parental leave, and company paid life insurance.

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

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 client, 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.

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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.

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