Locale : Global (English)
Iselin, New Jersey

New Jersey

Our New Jersey office is involved in many significant projects across sectors such as environment, waste/wastewater, digital, tunnels, and geotechnical engineering.

Explore our range of roles in New Jersey and apply now >

The contribution of all is valued and everyone is encouraged and supported to grow professionally.


(Principal consultant)

Our North American headquarters in Iselin, New Jersey, represents a key part of our thriving business in North America, which includes 2,300 staff delivering projects from 64 offices in the US and Canada. The Iselin office has been operating since 2014, though Mott MacDonald has served as a part of the engineering landscape in the region for over eighty years.

Established in the US in 1937 as Killam Associates, a water, wastewater and environmental services firm, Mott MacDonald has evolved into one of the leading engineering and construction firms in North America, delivering a variety of influential and award-winning engineering projects.

Our spacious office in Iselin is located at 111 S. Wood Avenue, with excellent access to key local transport routes such the Metropark Train Station, New Jersey Turnpike, and Garden State Parkway. Thanks to these convenient transport links, our New Jersey office in is easily accessible for employees commuting in from cities such as Newark, Jersey City, Edison, Trenton, and more.

Engineering jobs in Iselin, New Jersey

When joining Mott MacDonald in North America, you can find a career in engineering that’s hugely rewarding. With a broad range of engineering disciplines and specialties represented in our comprehensive integrated solutions, you can be involved with cross-disciplinary projects at different scopes and scales. The Iselin office specializes in the environmental, waste/wastewater, digital, tunnels, and geotechnical engineering sectors.

Our projects include the following:

Block Island Wind Farm

Based on our reputation as a leading environmental and civil engineering company, our Iselin team served as the lead technical advisors and engineers on the first offshore wind farm in the US. Providing design, geotechnical and financial advice, we are integral to the ongoing development of renewable energy projects in North America.

Hampton Roads Bridge-Tunnel Expansion

Mott MacDonald’s Iselin office is currently undertaking the design and construction of a $3.8 billion expansion project for the Hampton Roads Bridge-Tunnel in Virginia. This is the largest design-build procurement ever commissioned by the local government.

Using our digital, civil, and technical engineering expertise, we are expanding the capacity of the crossing with unprecedented accuracy, effectiveness, and minimal impact on the marine environment and traffic.

New York Harbor Water Siphon Replacement

Another major project undertaken by Mott MacDonald’s office in Iselin, New Jersey was replacing the existing water siphons in New York Harbor, the third largest port in the US. This provided unique challenges, as the team had to determine how to tunnel through the highly variable mixture of sands and clays on the floor of the harbor and ensure that the drills could withstand the hydrostatic pressure from above.

Discover more about the exciting projects that Mott MacDonald delivers in New Jersey and throughout North America.

Project manager jobs in Iselin, New Jersey

Operating in a wide range of sectors, Mott MacDonald’s Iselin office offers a varied choice of project manager roles with opportunities across environmental, waste/wastewater, digital, tunnel, and geotechnical engineering projects.

As a project manager with Mott MacDonald in New Jersey, you can have the opportunity to oversee multiple aspects of multibillion-dollar projects, from conception to execution and completion.

You will be able to draw upon the expertise from professionals in your office and the wider network around the world to deliver transformative projects in the local region and across the US. Project manager roles at Mott MacDonald are crucial in ensuring that the projects we undertake exemplify our global vision and values.

Discover more about our project manager jobs in New Jersey here >

Civil engineering jobs in Iselin, New Jersey

Civil engineering as a discipline defines the structures that people require to live their lives comfortably. It transforms people’s day-to-day experiences through improvements to services and facilities. Civil engineers are vital in ensuring that the country has an efficient, safe, and reliable infrastructure. Mott MacDonald has left a lasting impact on the local community, providing better experiences for people in New Jersey and beyond.

For example, our civil engineers provided final design and construction support on a recently completed $6.8 million bridge replacement project. The completion of the Route 35 Bridge project, on a major access route to the Jersey Shore, resulted in improvements for both drivers and pedestrians as girders, deck, parapets, and sidewalk were replaced. The long-term function of the bridge was ensured with improvements to the superstructure, substructure, lighting, and bridge approaches.

At Mott MacDonald, you will combine your technical knowledge with those around you to transform living environments across North America. As well as civil engineering jobs, our Iselin office offers a range of positions for those with specialized civil engineering expertise such as tunnel engineers, highway engineers, bridge engineers, or water/wastewater engineers.

Discover more about our civil engineering jobs in New Jersey here >

Digital jobs in Iselin, New Jersey

At Mott MacDonald, we are proud to be digital by default.

For us, this means exploring an integrated digital approach on almost every project that we are involved with. As a digital professional with Mott MacDonald, you’ll find a range of technologies to explore, ranging from AutoCAD to Rehearsive, our new BIM product using immersive virtual reality technology, which launched in May 2020. In addition to exploring new tools, you’ll also shape the future of our digital capabilities by developing new products for Mott MacDonald and its clients to use in North America and around the world.

For example, the Mott MacDonald Fieldbook was created in the Iselin office, an exclusive map-based solution for communicating with staff in the field. Developed for a leading utility company to deliver critical documents to their field crews, Fieldbook uses cloud-based technologies and an integrated GIS system to provide real-time information on projects or assets.

It is now used by thousands of individuals daily to help them make decisions and manage their projects, assets, and work. This resulted in our client achieving their goal of replacing over 2,400 lead service lines within a 12-month time frame.

At Mott MacDonald, we are always looking for digital professionals with skills across a range of areas such as Building Information Modeling (BIM), information management, geospatial technology, smart infrastructure, smart mobility, artificial intelligence, and machine learning. If you’re ready to be part of new technologies that shape decision-making throughout our organization, then discover more about our digital opportunities below.

Discover more about our digital jobs in New Jersey here >

Environmental engineering jobs in Iselin, New Jersey

Before a project is started, small or large, the impact it has on the environment needs to be considered and calculated. Environmental engineers are needed at every stage of the project to ensure compliance with existing regulations and respond to new developments as they unfold.

Our environmental projects cover engineering areas such as sustainability, natural resource management, environmental planning and risk management, waste management, contaminated land, coastal protection, and geomorphology.

Our Iselin team brings together environmental engineers with an understanding of different fields such as soil science, biology, chemistry, water/wastewater, and many more. By combining this environmental engineering expertise with the experience of other disciplines, Mott MacDonald can create truly integrated solutions for a wide range of challenges.

For example, environmental engineers at the our office in Iselin are currently providing consultancy to the largest investor-owned water and wastewater utility in the US, to support its facilities and minimize its environmental impact.

Discover more about our environmental engineering jobs in New Jersey here >

Geotechnical engineering jobs in Iselin, New Jersey

Geotechnical engineering is a crucial, supportive branch of civil engineering that considers how structures and projects will affect and be affected by the earth materials surrounding them.

Our geotechnical engineers make up a crucial part of our multidisciplinary approach to infrastructure projects. They often collaborate with tunnel and transportation engineers in other departments to ensure the success of those projects.

Discover more about our geotechnical engineering jobs in New Jersey here >

Ready to find a fulfilling engineering career at Mott MacDonald? Explore our range of roles and apply now >

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