Latest News:

Q&A with expert witness, Simon Braithwaite Meet our Interns in New York Data Centre Essentials: Design, Construction, and Operation of Data Centres for the Non-expert Diales host session at Berlin Dispute Resolution Days Diales collaborate to deliver another sculpture at the Goodwood Festival of Speed London Legal Walk 2023 We are delighted to release the third edition of the Diales Compendium Michelle McMillan is promoted to Director for Canada Combustibility & Liability – Who pays for the high rise fix? Diales welcomes a new Chief Financial Officer Driver Trett release their second Digital Digest Online Briefings | Cladding – The Implication For Valuation Meet and Greet Diales and EVRA in person Join our Technical support team in the Middle East Quantum Expert, Javier Sánchez Llopes, wins Client Choice Award Celebrating our first year in New York Get to know the new Regional Head of Diales in Oceania We are hiring in New York Diales Discusses – Virtual Hearings Diales staff are re-elected to the SCL Council Martin W. J. Smith, Diales Technical Expert, features in Big Project ME Diales launch new Middle East service: Arabic Litigation Support Diales welcomes Adrian Kong in Singapore Mark Wheeler, Head of Diales, to speak at the UK Adjudicators Conference Webinar: The role of Expert Witnesses in construction and engineering disputes Diales Technical collaborate with artist Gerry Judah, to create Drift. Diales open a new office in Madrid Diales announce collaboration with EVRA Consulting (PTY) Ltd (EVRA) Diales welcomes David Merritt to it’s team of experts Diales feature on Leaders League Diales open a new office in New York Diales Technical shortlisted in the British Construction Industry Awards 2020 Head of Diales, Mark Wheeler, is published in Lawyer Monthly. Chris Sunderland joins Diales as our Marketing and Business Development Director Diales Technical feature in photo contest Diales reception, 5th March 2020 COVID-19 UPDATE Diales Sponsor 8th ICC MENA Conference on International Arbitration Construction Claims Dubai – Record Keeping Evaluating Contract Claims, 3rd Edition – Out Now Diales are excited to sponsor the 17th ICC Miami Conference on International Arbitration Diales Sponsor the 7th Biennial Conference on Construction Projects from Conception to Completion How To Avoid Construction Disputes – Maria Fisentzou Diales nominated in Structural Awards 2019 Diales are delighted to announce that Phil Duggan been appointed as Head of Diales for the Middle East Diales are proud sponsors of Asia ADR Week 2019 Diales are pleased to be sponsoring the 5th ICC Asia Conference in Singapore Diales are pleased to be sponsoring the 4th ICC Africa Conference in Lagos this week Diales is proud to be sponsoring the 3rd PAW and to host a conference Diales is delighted to be taking part in the 3rd Kuwait Project Management Conference 2019. Diales is proud to be sponsoring the 7th ICC MENA Conference on International Arbitration Dealing with conflicting pressures – A practical guide Diales Technical are shortlisted for an award. Diales are proud sponsors of the CIArb’s International Arbitration Conference 2018 Flying high! Another Goodwood sculpture success Diales Host Drinks Reception GAR Live Construction Disputes ICC Institute Advanced Training on “Drafting enforceable awards” Should arbitration in investment protections treaties be forsaken? DRBF Conference – Paris, France Diales work with Gerry Judah on a new sculpture – Jacob’s Ladder Diales experts gain professional recognition Diales have two new experts Diales host successful drinks reception Diales are commended at the 2017 Structural Awards Mark Castell is attending the 2017 Dutch Arbitration Day, Amsterdam Independence Day: Why Do Many Experts Fail at Being ‘Independent’? John Mullen is published in the Construction Law Review Diales technical are shortlisted for two awards Diales celebrates five years of dedicated Expert Witness support services ICC 1st European International Arbitration Conference Diales are the lead sponsor of Kuala Lumpur International Arbitration Week

Expert Profile

Professor Colin Eddie

Professor Colin Eddie

Technical Expert

BSc (Hons) Civil Engineering
HNC Civil Engineering
ONC Civil Engineering
Asia Pacific
Middle East
United Kingdom


  • Chartered Civil Engineer
  • Tunneling expertise
  • Over 35 years of industry experience
  • Extensive experience of current best practice in both the design and construction of tunnels
  • Acted as an Independent Expert Witness


Colin is an expert in the design and construction of tunnels and underground space. He has 38 years’ experience in the tunnelling industry and has an intimate working knowledge of current best practice in both the design and construction of tunnels. This includes a detailed knowledge of all forms of temporary and permanent construction methodologies in use today.

He manages an active research and development programme and has been personally responsible for the introduction of many innovations which have been credited with improving the safety, efficiency and quality of many recent major projects. In 2011, he successfully led (on behalf of the British Tunnelling Society) the launch of the MSc in Tunnelling and Underground Space at Warwick University and he actively supports the course as a member of the Industrial Advisory Panel and champion of the construction methods module of the course.

In 2005, he was invited to become a Fellow of the Royal Academy of Engineering and in 2015 he was further honoured with the appointment of Royal Academy Visiting Professor of Innovation and Tunnelling at the University of Warwick. In 2014 The UK Institution of Civil Engineers awarded him the John Mitchell Gold Medal in recognition of his significant contribution to tunnelling.

Until recently Colin was engineering director of one of the UK’s largest tunnelling firms and managing director of the in-house design consultancy business. In June 2017, he formed his own consultancy business and has been responsible for the management of a specialist underground engineering department, which has undertaken the detailed design of some of the largest underground projects in the UK.

In the last twenty years, most of his tunnelling projects have been of a design and build nature and he has managed the implementation of over £2.5bn of tunnelling work in this time.

The first nine years of Colin’s career were spent on site on a variety of soft ground and rock tunnelling projects. Since 1988 he has been responsible for the underground engineering activities and formed the consultancy in 2002. To promote a seamless interface between design and construction, he encourages regular contact between the design teams and the worksite and, where appropriate co-locate on site.

In addition to the management of permanent and temporary works design, Colin has been responsible for the introduction of formal risk management procedures. He is passionate about the integration of design with construction and has led a “Safe by Design” culture to improve safety and to promote efficiency through world class engineering.