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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

Garth McComb

Garth McComb

Regional head of Diales (Asia Pacific) - Quantum and Delay Expert


BSc (Hons) Quantity Surveying

Memberships & Associations

Society of Construction Law (Malaysia)

Contract Experience


Presentations & Training

Common Pitfalls in Claims – A practical perspective, 2012
2 day training seminar on Contract Management, 2011
Seminar on the LTA Form of Contract, 2010


Oil & Gas

Regional Experience

Asia Pacific
United Kingdom

Cross-Examination Experience



  • Chartered Quantity Surveyor
  • 20 years of cost and contract management experience
  • Empanelled as an adjudicator by KLRCA
  • Extensive dispute experience across the Asia Pacific region
  • Cross-examined in arbitrations in matters of quantum and planning


Garth is a chartered surveyor with over 20 years of post-graduate experience, predominantly in Asia, in the cost and contract management of numerous construction projects.

He has an excellent working knowledge of the main forms of building and civil engineering contracts used in Singapore and Malaysia; and also the FIDIC international form of contract through working on projects in India and Thailand.

Garth has experience of presenting, debating, and negotiating a range of claim issues at mediation, in the preparation of witness statements, and giving evidence at hearings in matters of arbitration between main contractor’s and clients or sub-contractors.

His previous assignments include providing Contract management service and claim support to the main contractor on a large underground railway project in Singapore over a period of almost six years. Garth has also given factual evidence in a number of hearings in matters at arbitration.

Garth has completed the KLRCA adjudication training programme examinations and is empanelled as an adjudicator with KLRCA. He is currently based in our Malaysia office.

This expert has the following cross-examination experience:

  • High Court Action
  • Domestic Arbitration
  • Adjudication/Mediation