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Mark Southwell

Global Practice Director

Providing essential mobility for commuters, families, students, older adults and persons with disabilities.

Public transportation systems, valued as some of the most equitable and sustainable modes of transportation, connect communities and help stimulate economic development. 

Expanding these complex systems and adding more advanced solutions, such as high-speed rail, to meet public demand can be an intricate, high-intensity ride. 

Whether your journey includes keeping pace with capacity building and accelerating technology innovations, ensuring safety and security or maintaining transport networks, we’re on board to serve all aspects of light rail, metros/urban transit, commuter rail, high-speed rail, bus rapid transit, freight rail and intermodal facilities.

CH2M has close to 600 transit and rail professionals around the world delivering solutions with the right mix of engineering, regulatory and business expertise.

Our history is proof that we thrive on working with clients to design and manage their most challenging capital improvement projects, hone vehicle and facility assets and put technology and safety programs into practice that keep people on the move and enhance the rider experience.

  • Transit and rail engineering design 
  • Program and construction management
  • Vehicle engineering and procurement
  • Train control and communications systems 
  • Feasibility studies 
  • Asset management 
  • Revenue collection systems
  • Environmental documentation
  • Intelligent transportation systems
  • Safety and security 
  • Management consulting
  • Sustainability planning
  • Intermodal facilities 
  • Tunnel and geotechnical engineering design
  • Rail bridge and viaduct engineering design
  • Station, platform and maintenance facilities design

Clients & Projects

Program Management

Cities and regions are updating capacity and creating new rail lines to enhance mobility, job growth and economic development. You can count on our deep domain knowledge and proven management expertise to successfully deliver your complex transit or rail program. 


Crossrail, London, United Kingdom >

Partnering with Crossrail to ensure the successful delivery of Europe’s largest construction project, we’re serving as the lead party in the Transcend Program Partner organization on this visionary rail project. 


Metrolinx Light Rail Transit Program, Toronto, Ontario >

Transforming regional transportation across the Greater Toronto and Hamilton Region, we’re proudly serving Metrolinx as the program manager and owner’s engineer on the largest public transit investment in Canadian history.

Riyadh Public Transport

King Abdulaziz Project for Riyadh Public Transport, Riyadh, Saudi Arabia

Bringing Riyadh on par with the world’s great cities, we’re helping advance the Saudi capital’s visionary public transport modernization program with integrated Program Management Office support.


Honolulu Rail Transit Project, Oahu, Hawaii

Reducing traffic congestion on the island of Oahu, the new 20-mile elevated rail line is advancing with CH2M's general engineering consultant and construction engineering and inspection services.

Haramain high speed rail

Haramain High Speed Rail, Saudi Arabia

Linking the cities of Makkah, Jeddah, the new King Abdullah Economic City and Medina, Saudi Arabia’s first high-speed, inter-city rail transport system is being managed by our joint venture project services team.

The Middle East is one of the fastest growing rail markets in the world. The projects currently under construction will add an approximate 30,000km of rail across the region, that's nearly 5 times the length of The Great Wall of China.


Mark Loader


Rail encompasses the broadest range of disciplines in any transportation infrastructure project. With our technical expertise and ingenuity, we’re uniquely poised to offer a full spectrum of engineering design services, from tracks to tunnels and bridges, to rolling stock and train control and communications, to rail stations and intermodal and maintenance facilities. We do it all, and we do it right.

Portland-Milwaukie Light Rail Transit

Portland-Milwaukie Light Rail Transit, Portland, Oregon

Integrating multiple modes of transport in a constrained urban roadway corridor, we provided preliminary engineering and final design for a 1-mile stretch of the MAX Green Line extension in downtown Portland.

London Overground Capacity Improvement Program

London Overground Capacity Improvement Program, London, United Kingdom

As lead designer, we’re helping Transport for London increase capacity, moving from four-carriage to five-carriage trains, upgrading all rail infrastructure while continuing daily service.

Hyderabad metro rail

Hyderabad Metro Rail, Hyderabad, India

Fostering urban rejuvenation and transforming Hyderabad into a commuter-friendly city, the new metro rail project is progressing with our detailed design of the rail viaduct structure.


Tottenham Court Road Station Upgrade, London, United Kingdom

As design consultant, we led a multidisciplinary effort to upgrade one of the busiest stations on the London Underground, garnering international tunneling recognition.

Green Line extension

Green Line Extension, Downtown and Orange Line Low Floor Stations Project, San Diego, California

Connecting workers to job centers, older adults to service resources, residents to affordable housing, and travelers to regional transport hubs, this award-winning project was delivered with the support of our design team.

bond street station

Bond Street Station Upgrade, London, United Kingdom

Our joint venture is providing detailed design to increase Bond Street Station’s capacity by 45 percent, better serving UK’s busiest shopping district on the new Crossrail route.

Nuences River Rail yard

Nueces River Rail Yard, Port of Corpus Christi, Texas

Improving the Port’s rail infrastructure and transportation network, the CH2M-designed rail yard will have the capacity for 1,200 railcars, including up to eight 150-car unit trains.

Docklands light rail extension

Docklands Light Railway Extension. London, United Kingdom

Providing a much-needed transport link between Woolwich town centre, central London and London City Airport, our team offered expert technical design support for the rail extension running under the River Thames.

High Speed 1

High Speed 1 (HS1), United Kingdom

Linking central London with Paris, the UK’s first high-speed railway was delivered with our support as a member of a consortium, responsible for all design and project management services.

Tunnel construction of underground light rail systems in urban environments is among the most demanding and technically challenging forms of civil infrastructure today.


Tom Donahue

Director of Transit & Rail Market Segment, North America
Construction Management

Valued for our reliable, proactive and highly effective coordination of stakeholders and activities, we’re consistently ranked among the top firms in construction management. We earned our reputation by leveraging 7 decades of experience managing construction projects successfully to on-time and on-budget project completion.

Sound Transit University Link

Sound Transit University Link and Northgate Link, Seattle, Washington

Extending service to the largest urban centers in the state of Washington, both the University and Northgate links are progressing with the aid of our construction management services.

Mason Corridor MAX Bus Rapid Transit

Mason Corridor MAX Bus Rapid Transit, Fort Collins, Colorado

Operating as the first bus rapid transit initiative along Colorado’s Front Range, the project was completed on time and $2 million under budget with the diligence of our construction management team.


Keeping pace with our rapidly changing world is a monumental challenge. We can help you stay ahead of the game with our broad range of railway consulting services around policy, planning, technology, funding, procurement, asset management, safety, security and resilience that advance your business and operational goals, keeping your systems on the move. 

Amtrack ACS-64

Amtrak ACS-64 Cities Sprinter Electric Locomotives, United States

Helping to power the economic future of the Northeast region, our procurement, design and commissioning experts helped deliver Amtrak’s new fleet of 70 Tier I, higher-speed electric locomotives. 

Klang Valley Mass Rapid Transit

Klang Valley Mass Rapid Transit (MRT) Lines 2 & 3, Malaysia

Supporting an increase in the Kuala Lumpur metro area rail network, CH2M developed the feasibility study for MRT Line 2 from Sungai Buloh to Serdang to Putrajaya, and MRT Line 3, the orbital train system around the city center.

California High Speed Rail

California High-Speed Rail, Merced to Fresno, California

Supporting the California High-Speed Rail Authority with the first rail segment to go to construction, our team was instrumental in achieving the program’s first environmental Record of Decision.

adelaide rail network

Adelaide Rail Network Electrification, South Australia

Developing a safe, efficient and sustainable rail electrification system, we’re providing design and construction services for a faster, cleaner and more efficient mode of transport for Adelaide’s rail network.

System Safety and Security planning

System Safety and Security Planning, San Diego, California

Our experts developed a multimodal integrated system safety management program as part of the North County Transit District’s overall transportation safety management policy and program manual.


Ventra — Chicago Transit Authority and Pace Open Standards Payment System, Illinois

Easing the customer fare payment experience while providing seamless adoption of payment technology innovations, we helped develop the first design-build-finance-operate-maintain transit fare system in North America.

Sydney Waratah Trains

Sydney Waratah Trains, Australia

Serving as the technical advisor for the largest train procurement in Australian history, we led train specification development, reviewed train designs, monitored manufacturing, and supported final testing and commissioning of 626 cars.

Chicago Regional Transportation Authority Asset management

Regional Transportation Authority Asset Management, Chicago, Illinois

To better serve the third largest U.S. transit market, we’re helping the Regional Transportation Authority evaluate its capital programs and develop tools and processes for asset planning decision making.

E65 High Speed Rail

E65 High Speed Rail Modernization, Poland

Increasing the competitiveness of Polish railways as well as supporting rail development as a safe and environmentally friendly transportation alternative, the CH2M-led feasibility study pinpointed the right solutions to upgrade the nearly 350-mile route so it could accommodate high-speed rail.