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

Octavian Dan

Octavian Dan

Delay Expert

Master of Architecture
Post-Graduate Diploma
Project Management (RICS)
Practising Member of The Academy of Experts (MAE);
Member of the Society of Construction Law UK;
Member of the Society of Construction Law Romania
Octavian has presented topics including ‘Time and Schedule Management’, ‘Methods of delay analysis’ and also delivered a Masterclass on ‘Demonstration and Valuation of Disruption’
Oil & Gas
Process & Industrial
Middle East
United Kingdom


  • Project Manager
  • Over 30 years’ experience in the construction industry
  • More than 25 appointments in adjudications and arbitrations
  • Has been cross-examined
  • Specialises in delay analysis across various sectors
  • Fluent in English, French and Romanian


Octavian is an experienced project manager with over 30 years of experience in the construction industry. He has been appointed as a delay expert on more than 25 occasions, including French language disputes, and has been cross-examined in arbitration.

Octavian is trilingual (English, French, Romanian) completing his architectural degree in Romania, its equivalency in Belgium and a project management diploma in the UK. He has worked on a wide variety of project sites across Europe including high-rise offices, retail and residential buildings, a railway station, a prison and industrial plants.

He is specialised in forensic delay and disruption analysis, resolution of time-related issues and uses various recognised analysis techniques based on the critical path of the project. One of the matters he worked on was referred for enforcement to the High Court Mr Justice Akenhead (Cantillon Limited –v- Urvasco Limited [2008] EWHC 282 (TCC)).

He has acted as expert in arbitrations and adjudications as well as providing independent assessments and monitoring, contractual and audit support and project management services across Europe, Africa, Asia and the Middle East. He has undertaken expert commissions for project disputes ranging from buildings, petrochemicals, offshore oil rigs to water treatment, and power plants.

Octavian is a respected expert in his field and clients consistently commend him for both the quality of his analysis and reporting, but also in his ability to work quickly to identify relevant details in a dispute and bring clarity to those who need to be able to present the facts in concise and robust manner. Octavian published articles in Construction Law Review and in International Construction Law Review.

This expert has the following cross-examination experience:

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

This expert has recently been instructed by:

  • Andritz Hydro GmbH
  • Gide Loyrette Nouel LLP
  • Linklaters LLP
  • Multiplex Construction Europe Ltd

“Mr Dan criticised Urvasco’s programming evidence. Much of his criticism was upheld by the Adjudicator. The reply and supporting evidence was very substantial.” Mr. Justice Akenhead (in TCC Judgement on ‘Cantillon v Urvasco’).