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East Side Access Children holding up books Visualisation of the proposed extension View of the suspension bridge at night Power plant at night Visualisation of high speed train

United States of America

Our business in North America is thriving. With over 2300 staff in 64 US and Canadian cities, Mott MacDonald is delivering pivotal projects in the transport, water, oil and gas sectors, plus projects in education, power, buildings, and infrastructure finance.

Oil and gas

For the Southeast Market Expansion project, undertaken for Boardwalk/Gulf South Pipeline, we provided project management, engineering design, surveys, mapping, right-of-way acquisition, environmental support, and construction bid packages for 70 miles of pipeline between central Mississippi and the Gulf Coast.

We provided similar services to Spectra Energy to provide 60 miles of pipeline and metering facilities to move natural gas across Pennsylvania, supplementing their existing pipeline system.


Our education experts at Cambridge Education worked with Springfield Public Schools to provide 130 administrators and district staff with training to meet the new Massachusetts Educator Evaluator Rubric and supporting the design and implementation of a curriculum alignment plan. The District is now able to provide more targeted professional development customised to requirements of individuals.

For Hillsborough County Public Schools we helped implement the Empowering Effective Teachers initiative, requiring that teachers are observed by administrators, peer evaluators and mentors. In 2013, we collected and analysed over 2,500 lesson observation scores with the resulting analysis being used by the county to help inform its decision making.

Through a partnership with Dr Ronald Ferguson of Harvard University, Cambridge Education delivered The Tripod Project®, a system for US educator evaluation using staff and student surveys. These surveys have been an integral part of the Gates-funded Measures of Effective Teaching project, which is improving results in English and Mathematics.

Highways and bridges

We are providing program and design management for the Alaskan Way viaduct and seawall replacement program. A 2.7km bored tunnel for a two-level stacked roadway will replace the viaduct along the existing SR-99 corridor .

For the Brooklyn-Battery tunnel in New York we provided construction administration and inspection services for the replacement of equipment including switchgear and electrical feeders at the four tunnel ventilation buildings. In the aftermath of Hurricane Sandy, we are designing replacements for all electrical, mechanical, structural and communications equipment.

We are providing programme management and monitoring design and construction of the new $6 billion, 1.6km San Francisco-Oakland Bay self-anchored suspension bridge. A range of technical, logistical and procurement proposals shaved US$400 million off the projected delivery cost.

Aerial view of bridge under construction
San Francisco–Oakland Bay Bridge, USA
San Francisco–Oakland Bay Bridge, USA We are providing programme management and monitoring design and construction of this new 1.6km self-anchored suspension bridge.


We are subconsultant and programme manager for the downtown rail extension of the $4.2 billion Transbay Transit Centre in San Francisco. The transit centre will house nine bus and rail systems in one facility, making it the largest of its kind west of New York City.

We were awarded project management, preliminary design, environmental engineering, permitting, and right-of-way acquisition services contracts for three segments of the California High Speed Rail system. Spanning 800 miles from San Francisco and Sacramento in the north to San Diego in the south, and operating at speeds up to 220mph, it is projected to transport 100M passengers per year by 2030.

As lead consultant for the Crenshaw/LAX transit corridor we are providing engineering services in support of the environmental clearance and development of the design-build delivery. The corridor extends 8.5 miles including at-grade running sections, aerial alignment, underground cut and cover segments, tunnel segments, underground stations and one aerial station.

We've been providing programme and construction management for the US$7.3 billion East Side Access project in New York city, connecting the Long Island Rail Road line into Grand Central Station – America’s largest infrastructure project. Conditions range from soft ground in Queens to hard rock under Manhattan, requiring a huge variety of tunnelling techniques. With many contracts progressing simultaneously in complex and challenging conditions, our industry-leading technical expertise and experience of delivering some of the world’s toughest tunnelling projects is being used to keep East Side Access on track.

Two tunnel boring machines in the ground
East Side Access, New York, USA
East Side Access, New York, USA We are providing programme and construction management for the US$7.3 billion project connecting the Long Island Rail Road line into Grand Central Station.


We implemented the sustainable airport planning, design and construction guidelines for the midfield satellite concourse expansion at Los Angeles International Airport, which forms part of a $5 billion modernisation programme.

In 2012, Airbus made the decision to become the first new manufacturer of large commercial aircraft in the US in more than 40 years. We were selected to provide program management services for the design and construction of the Airbus Final Assembly Line, in association with Hoar Program Management. The plant, located at Brookley Aeroplex in Mobile, Alabama, will assemble and deliver planes in the Airbus A320 Family of single-aisle jetliners.

Plane in front of terminal building
Midfield satellite concourse, Los Angeles International Airport, USA
Midfield satellite concourse, Los Angeles International Airport, USA We implemented the sustainable airport planning, design and construction guidelines for the midfield expansion which forms part of a $5 billion modernisation programme.


We have a strong track record spanning three decades in the power engineering industry, covering thermal and renewable generation as well as transmission and distribution. At Brayton Point power plant we have helped deliver the first US cooling towers to be built in 15 years, 25% ahead of schedule and 20% under budget.

We undertook detailed engineering and design for a 800MW gas fired simple cycle power plant in Palm Desert, California, and are providing owners’ engineering for the 725MW CPV Woodbridge Energy Center in New Jersey.

Power plant cooling towers
Brayton Point cooling towers, New England, USA
Brayton Point cooling towers, New England, USA We were owners’ engineer for the retrofit of two cooling towers, cutting construction time by 12 months and saving $100 million.
Image credit Marc N Belanger


In Washington DC we are providing programme management in support of DC Water's ongoing $350 million 10-year water system capital improvement program. Having implemented the water system geographic information system, the team is now helping develop an integrated water distribution and sewer collection system.

Our water team provided engineering services to Aqua Pennsylvania on the upgrade of the 16 million gallons per day Neshaminy Water Treatment Plant – one of the first major water treatment plant projects fully executed using building information modelling.

DC Water capital improvement programme, USA
DC Water capital improvement programme, USA Since 2001, HMM has provided program management for the $350 million 10 year water system capital improvement program in Washington DC.
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