Cláudio Cabral Dias is a Portuguese tunnel engineer currently based in Madrid and working at Ayesa, as a Principal Tunnel Engineer. He is 34 years old and has over 10 years of international tunnelling experience, having lived and worked in Portugal, Brazil, United Kingdom, and Spain.

In September 2014, he joined CH2M (now Jacobs) as a Tunnel Design Engineer in London and started working on the Ipswich Cable Diversion Works, the National Grid Tunnels, and the Tottenham Court Road London Underground Station Upgrade. In May 2015, he was seconded to Crossrail as a Field Tunnel Engineer for Fisher Street crossover tunnels and caverns site. Then he worked as CAT 3 reviewer for the Purple Line of Los Angeles Metro. Lastly, he worked on the detailed design of Hinkley Point C Marine Works, as Lead 3D Modeller and as Package Manager for cast in-situ lining. In May 2018, he was hired by TYPSA, as a Senior Tunnel Engineer for the High Speed 2 project, London contracts, to work for a Design JV of TYPSA, ARUP and STRABAG. I worked as SCL Design Manager, responsible for the design team of 4 ventilations shafts and led a team of 10 people. In December 2020, I joined Ayesa and was recently promoted to Head of Ground Engineering and Tunnelling, with the responsibility to lead and grow the tunnelling team of the company based in Madrid, Spain.