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

Helen Bentley

Helen Bentley

Delay and Technical Expert

BSc (Hons)
Accredited mediator (CEDR)
Delivers presentations, training, and seminars on subjects including NEC3, contract administration, and JCT
Process & Industrial
Middle East
United Kingdom


  • Chartered Civil Engineer
  • Over 30 years of engineering and construction experience
  • Common sense approach analysis
  • Extensive contract administration experience
  • Recent live project involvement


Helen is a chartered civil engineer with over 30 years’ experience. She initially trained with a firm of consulting engineers, performing numerous roles as contract administrator. Helen’s experience covers a wide range of projects including tunnelling work, sewage treatment plants and sea defences, process engineering including cement works, power stations and nuclear works, underground rail projects, and building works including refurbishment and new build; many including significant mechanical and electrical installations.

Helen has worked for clients, contractors, subcontractors, and suppliers dealing with claims both up and down the line and has a varied and fair perspective on all elements of the supply chain. She understands the need to effectively communicate analysis outcomes to ensure that any testimony provided can be readily understood and considered.

Moving into claims consultancy in 1995, Helen has maintained active project involvement, advising clients on matters of delay and contract administration, including appointments, as contract administrator, to bring to a conclusion some difficult and complex schemes mid way through the project. Helen also undertakes technical appointments within her field of experience, She has advised on a wide number of contracts including NEC3, PPC2000, JCT, ICE, and bespoke forms of contract.

Helen has been instructed to produce expert reports and has acted as technical expert witness and delay analyst, on building, infrastructure and transportation projects across the UK and the Middle East. She has given evidence and been cross examined in ICC Arbitrations, Adjudications, and mediations. Helen operates in a wide range of sectors including building, infrastructure, transportation, and energy.

This expert has the following cross-examination experience:

  • International Arbitration
  • Adjudication/Mediation
  • Successfully completed external cross examination courses

This expert has recently been instructed by:

  • Bevan Britton
  • Brodies
  • Clarke Willmott
  • DLA Piper
  • Fenwick Elliott
  • Foot Anstey
  • Herbert Smith Freehills
  • Kennedys
  • Veale Wasbrough Vizards