Latest News:

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 is proud to be sponsoring the 4th ICC Asia Conference on International Arbitration 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 Damp in Listed Buildings 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

Expert Profile

David Waddle

David Waddle

Delay Expert


Diploma International Arbitration

Memberships & Associations

Chartered Construction Manager

Contract Experience


Presentations & Training

Regularly presents on the subjects of planning, delay analysis, and project controls


Oil & Gas

Regional Experience

United Kingdom


  • Chartered Construction Manager
  • Over 35 years of industry experience
  • Specialist in complex projects
  • Over 26 expert appointments
  • Cross examined in various forms of tribunal
  • Acted as advisor and analyst on more than 50 occasions


David learned the building process, the specific skills of measurement, work study, and construction planning working for a local authority direct labour organisation. He went on to further advance these skills – including project management – during 22 years of working for building and civil engineering contractors with signature projects including the M25 motorway; Manchester Airport Terminal 2; and the new Government Communications Headquarters (GCHQ) building.

David made the move to consulting in 2000, as this was a role where he could best utilise his experience and provide clients with practical, straightforward advice. He is regularly instructed as an expert to analyse the cause of project delay or act as a project advisor. Many of the commissions related to infrastructure, marine, civil engineering, pipelines, and building projects on behalf of main contractors or employers; but others include train manufacture, ship building, and sub-sea mining equipment manufacture.

David’s reports have been presented in various tribunals including the Technology and Construction Court (TCC), Court of Session (Scotland), Dutch Court, and UK arbitration and adjudication; and he has been cross-examined. Capable of quickly locating the key issues and articulating his analysis clearly and concisely; David has established himself as a delay expert with a highly successful track record. Complex disputes are frequently settled in favour of his client.

In an adjudication his analysis demonstrated a 120 week delay against an original 104 week contract period. The adjudicator agreed entirely with David’s analysis and in his decision commented that David had “articulated his analysis clearly” and his report was “clear and comprehensive”.

David’s project management experience has been utilised to prepare and lead recovery strategies for distressed projects. He has also performed due diligence exercises in connection with mergers and acquisition.

This expert been instructed by:

  • Addleshaw Goddard
  • Bergmann
  • Burness Paull
  • Carson McDowell
  • CMS Cameron McKenna
  • Harper Macleod
  • Pinsent Masons
  • Shepherd and Wedderburn

In a recent dispute the contract administrator noted:

In a new build leisure centre dispute the contract administrator noted: 
“[David has] prepared a very thorough and clear statement and I understand it without the need for a meeting”.

In a civil engineering dispute, David acted as an expert advisor in a case which reached an amicable settlement. Afterwards, David’s client stated:
“We reached an amicable settlement, which in the end is what we wanted. Thank you very much for your input which did indeed help us greatly and give us the confidence to negotiate to our strengths.”