Technical Director Tunnels

Mott Mac Donald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you’re surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued.

Whatever your ambition, Mott Mac Donald is where people come to be brilliant.

We help conceive, drive, and implement transport solutions for cities, regions, and asset owners/operators around the globe. From preparing the business case and advising on related issues - such as revenue, procurement, and environmental legislation - to delivering the completed infrastructure and helping maintain it. Our planning, engineering, environmental and management skills cover the whole project cycle. We play a major role in developing and delivering the Global Transport Sector Strategy.

Our Tunnels team is one of the global leaders in tunnel planning, design and construction in all conditions from soft ground to hard rock. Having planned and designed numerous road, rail, metro, water and service tunnels across the globe including HS2, London’s Thames Tideway East Tunnel, Northern Line Extension and Crossrail, we continue to be involved in many of the most challenging civil/structural and tunnel, underground works and hydro-electric engineering projects.

We are currently looking to recruit an industry leading Technical Director to join our Croydon office to reinforce and grow our regional capability as an important addition to our UK and Global Tunnelling Team.

You will provide technical leadership, strategic direction and assurance for complex tunnelling and underground infrastructure projects globally. You will act as a recognised authority in tunnelling, driving excellence in design, delivery, and client outcomes while supporting business growth and capability development. Ideally, we are looking for someone who can support our current focus on innovation in the digital space.

As a senior member of the Croydon Tunnel Team, you will support the Tunnel Leadership team in the pursuit and delivery of underground infrastructure projects across multiple markets. A significant proportion of the work is expected to be with design-and-build contractors. The portfolio of projects will include design of both transportation and utility tunnels.

You will provide design and integration with other engineering disciplines including structural, geotechnical, environmental, mechanical and electrical engineers covering a range of project requirements from new build to modification, asset maintenance or refurbishment.

• Technical Leadership & Assurance
  • Act as Technical Authority for tunnelling and underground works (TBM, NATM/SCL, shafts, stations, immersed tunnels, etc.)
  • Provide independent technical review and assurance on major projects and bids
  • Set and uphold engineering standards, design methodology, and best practice in line with Mott Mac Donald procedures
  • Lead resolution of complex technical challenges and risk mitigation strategies
• Project Delivery & Design Leadership
  • Act as Technical Lead / Design Director / Discipline Lead on major programmes
  • Oversee multidisciplinary integration (geotechnical, structures, MEP, fire/life safety, construction sequencing)
  • Ensure delivery of safe, buildable, and cost-effective solutions
  • Support project teams in value engineering and innovation
• Client Leadership & Work Winning
  • Serve as a trusted…