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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.
We are seeking an experienced Principal Engineer to lead the delivery and growth of stormwater, CSO, LTCP and flood risk services across New Jersey, and Eastern Pennsylvania. This role focuses on solving complex flooding, drainage, and resilience challenges for municipal, utility, and infrastructure clients.
The successful candidate will bring deep expertise in hydrology, hydraulics and NJ regulatory processes. Extensive experience navigating regional regulatory frameworks, and a proven track record delivering large‑scale stormwater, flood mitigation, and CSO programs is preferred. This individual will act as a technical leader, client advisor, and mentor, driving high‑quality project delivery and supporting strategic growth.
Key Responsibilities
Lead delivery of stormwater management, flood control, and drainage infrastructure projects, including pump stations, storage systems, and conveyance networks
Experience with H&H modeling using industry standard tools such as HEC‑RAS, HEC‑HMS, XP‑SWMM, InfoWorks ICM, SWMM, and related platforms
Direct floodplain analysis, watershed studies, and hydraulic system modeling across urban and riverine environments
Lead permitting and compliance efforts, including: NJDEP Flood Hazard Area (NJAC 7:13)
NJ Stormwater Rules (NJAC 7:8)
Understanding of NYSDEC and PADEP regulatory processes preferred
FEMA/NFIP coordination and floodplain considerations
NN Infrastructure Bank (NJEIT) funding
Serve as the primary liaison with regulatory agencies and stakeholders (NJDEP, FEMA, USACE, local authorities)
Deliver complex programs such as: Flood mitigation and resilience projects (e.g., floodwalls, pump stations, drainage upgrades)
Combined Sewer Overflow (CSO) LTCPs and sewer system improvements
Review and approve engineering designs, reports, specifications, and cost estimates
Lead project execution, managing scope, schedule, budget, and risk
Develop innovative, climate‑resilient solutions, incorporating future rainfall and flood conditions
Support business development through client engagement, proposals, and market growth initiatives
Mentor and develop staff, strengthening capability in stormwater, modeling, and flood risk disciplines
Candidate Qualifications & Experience
Bachelor's or Master's degree in Civil, Environmental, or Water Resources Engineering
Licensed Professional Engineer (PE) (NJ required, NY, or PA preferred)
Certified Floodplain Manager (CFM) strongly preferred
15+ years of experience in stormwater, drainage, CSO and flood risk engineering
Advanced experience in hydrologic and hydraulic modeling across complex systems
Strong background in: Floodplain and floodway analysis
Stormwater management design (BMPs, green infrastructure, subsurface systems)
Large‑scale sewer and drainage network modeling
Delivery of major infrastructure and resilience projects, such as: Flood mitigation and post storm recovery programs (including FEMA‑funded projects)
CSO Long‑Term Control Plans and wastewater system upgrades
Urban drainage and transportation‑related stormwater systems
Deep understanding of NJDEP, NYSDEC, and PADEP requirements
Experience navigating multi‑agency permitting and approvals
Familiarity with FEMA floodplain management and funding requirements
Proven ability to lead complex, multidisciplinary projects
Strong client‑facing skills with public‑sector stakeholders
Ability to solve complex, non‑routine engineering problems
Experience mentoring and developing engineering teams
Willingness to travel to project sites and attend key meetings as required
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.
The expected salary for this position is $165,000 - $202,000.
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
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.
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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Worksite address
morristown, NJ, 07961, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.