United Kingdom and Ireland

We have 11 offices across the United Kingdom and Ireland. Our local presence means we’re deeply connected to the communities we work in. We bring genuine impact and transformative solutions. We harness this local knowledge and combine it with global expertise.

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D2 is now TSA Riley

We're pleased to announce that D2 has officially rebranded as TSA Riley, marking the next step in our journey since D2 became part of TSA Riley in October 2025.

Our United Kingdom and Ireland Leadership Team

Andrew Tompson

Chief Executive Officer

Andrew is the CEO of TSA Riley, where he has been a Director since 2010. He is an experienced business manager and project director with an MBA and qualifications in engineering and property finance. Andrew has provided senior advisory and project director services for major government and private sector projects, including Sydney Light Rail and the NSW Government’s Barangaroo Delivery Authority. Before TSA Riley, Andrew worked at Macquarie Bank, Lendlease, and Arup. Andrew is based in our Sydney office.