Arup has named Giles Thomas as Principal and APAC High-Speed Rail Technical Director, reinforcing the firm's high-speed rail and major project capabilities across the region and globally. Based in Sydney from 20 April 2026, Thomas brings close to four decades of experience delivering complex, city-shaping rail schemes spanning the UK, Europe, Asia Pacific and the United States.

Thomas has held senior leadership roles on some of the world's most prominent rail and transport infrastructure initiatives, including High Speed Two (HS2) in the UK and the £6 billion Thameslink Programme. His career covers government, client, delivery partner and contractor organisations, giving him a rare end-to-end perspective on programme development, integration and delivery.

At Arup, Thomas will work with governments and clients to shape and deliver intricate transport programmes designed to unlock sustained economic growth, improved social outcomes and environmental benefits for cities and regions.

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"High speed rail and major transport programs are fundamentally city-shaping investments," said Michael McGowan, Arup's APAC Transport Leader. "Giles brings deep global experience in integrating complex systems, aligning stakeholders and making best-for-program decisions at scale. His appointment significantly strengthens our ability to support clients as Australia progresses its high speed rail ambitions."

Throughout his career, Thomas has led multidisciplinary teams of engineers, planners, architects and environmental specialists, overseeing system-level integration, technical assurance, investment decision-making and performance improvement across major programmes. He has also operated extensively within complex regulatory and governance settings, advising governments, regulators and senior decision-makers.

"Giles has consistently operated at the intersection of engineering excellence, commercial performance and public value," McGowan said. "His leadership on globally significant projects will help our clients navigate complexity, manage risk and deliver infrastructure that genuinely reshapes cities and communities for the better."

Commenting on his appointment, Thomas said he was excited to join Arup at a pivotal moment for Australia's transport future. "I'm looking forward to working with Arup's teams and clients to help shape high speed rail and major transport programs that deliver lasting benefits for cities, regions and future generations," he said.