Latest News:

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

Matthew Wills

Matthew Wills

Regional Head of Diales (Asia Pacific) - Quantum Expert


LL.M International Commercial Law
BSc (Hons) Design and Construction Management

Memberships & Associations

Director of the Chartered Institute of Arbitrators (Singapore) Ltd

Contract Experience



Oil & Gas
Process & Industrial

Regional Experience

Asia Pacific
Middle East
United Kingdom


  • Quantity Surveyor
  • Over 20 years’ experience in the industry
  • Extensive experience in the Oil and Gas sector (Contentious and Non-Contentious)
  • Extensive worldwide experience


Matthew Wills has over 20 years’ experience in the provision of commercial, quantity surveying, estimating, claims and disputes advice to local and international contractors, owners, and operators in the oil and gas engineering, procurement, and construction industries.

For the last 15 years, Matthew has principally been involved in offshore floating production (FLNG, FPSO, FSO) and Drilling industry, the onshore oil and gas industry (LNG, LPG, Refinery, Process and Chemical Plants) and the Marine and Shipping industries (Newbuild, Repair and Conversion).

This has involved providing contracts advice and administration advice, claims, change order assessment, arbitration and dispute management, expert witness (quantum & technical) appointments in both domestic and international dispute forums, ADR advice.

A notable successful appointment has been as the technical expert in the Singapore Court of Appeal case of KS Energy Services Limited v BR Energy (M) SDN BHD [2014] SGCA 16.

This expert has recently been instructed by:

  • Hogan Lovells
  • Reed Smith
  • Shalakany Law Office
  • Wong Partnership