Expert Witness

McComb provides expert witness services for complex construction disputes, led by Marcus Cato, a registered Arbitrator and Mediator with the Chartered Institute of Arbitrators. Our expert testimony on quantum and delay matters helps courts and tribunals navigate technical issues with clarity, reliability and precision.

Get in Touch

Our expert witness team has provided evidence in major infrastructure disputes, complex building developments, and international energy projects. Working across multiple jurisdictions, we help resolve disputes through clear, factual analysis and authoritative testimony.

Facade of a neoclassical government building with large columns, statues, and decorative stonework, under a clear blue sky.

Party Representation

Beyond expert testimony, we act as party representatives in arbitration and adjudication proceedings. We prepare comprehensive submissions, manage documentary evidence, and provide strategic advice throughout the dispute resolution process.

Contact Us

Expert Witness Services

Trusted, independent, and precise—our expert quantum services bring clarity to complex disputes.

  • Independent quantum assessments

  • Evaluation of valuation principles in line with contract terms

  • Expert witness reports for adjudication, arbitration, and High Court proceedings

With extensive experience across tribunals, we’re known for our independence, pragmatism, and meticulous attention to detail. We deliver clear, objective insight that stands up to scrutiny.

We also work closely with our sister company, Peer Consulting in Johannesburg, specialists in expert delay analysis. Together, we offer a powerful, integrated expert team ready to support any party.

Logo of the Chartered Institute of Arbitrators with a shield featuring a gold sword, scales, and a red arrow, alongside the text 'Chartered Institute of Arbitrators' and the abbreviation 'CIArb'.
A modern college building with green and beige exterior, surrounded by trees and a grassy lawn. People are walking and sitting outside the entrance, which has a sign reading 'Ardleigh Green'.

Case Study: New City College – Retender Exercise

Following challenges in reaching an agreement on terms with the contractor responsible for the PCSA during the RIBA Stage 4 design, MPL proposed a revised procurement strategy. This new approach leveraged the InTend portal, offering a cost-effective, self-managed, and PCR-compliant route to market.

The open tender process proved successful, attracting competitive bids from all participating contractors. As a result, the project is progressing well and is now just four months from completion, with occupation scheduled for September 2025.

 FAQs

  • Marcus provides expert testimony for quantum (financial) and delay matters in construction disputes. This includes complex payment disputes, variation claims, extension of time claims, and disruption claims.

  • An expert witness provides independent, impartial opinion based on their professional expertise. This includes analysing evidence, preparing detailed reports, and giving testimony in court, arbitration, or adjudication proceedings about technical matters within their field of expertise.

  • Marcus is a registered Arbitrator and Mediator with the Chartered Institute of Arbitrators and Kigali International Arbitration Centre. He has extensive experience in international dispute resolution and has provided expert testimony in cases throughout Europe and Africa.

  • Yes, Marcus has significant experience in international disputes and is registered with multiple international arbitration centres. He regularly provides expert testimony across different jurisdictions.