David Gibson

David Gibson

Quantum Expert
BSc [Quantity Surveying]., FRICS., FCIArb., FCInstCES., CEDR Accredited Mediator


  • Instructed by international construction legal firm to provide expert evidence on the claims and additional costs on a £275m tunnel project in London.
  • Instructed by in-house counsel for one of the global insurance companies on a factory rebuild after fire damage. Cross examined by three-man arbitration panel including experts 'hot tubbing' session.

Industry Experience

  • Heavy civil engineering
  • Infrastructure
  • Rail
  • Highways
  • Power
  • Water
  • Tunnelling

David founded DGA Group in 1993 to provide contractual, commercial and programming support services to clients in the construction industry.

David has also trained as an adjudicator with the Chartered Institute of Arbitrators and has completed the Bond Solon series of Expert Witness training courses in conjunction with the RICS. David's background is heavy civil engineering having worked on major road, tunnelling and rail projects both in the UK and internationally.

He has substantial experience in Adjudication, Arbitration and Litigation acting as advocate in managing the preparation of the client's case covering principle, quantum and time. He has undertaken many appointments as Expert witness on quantum issues on major infrastructure projects both in the UK and internationally and has been cross-examined.

His services are keenly sought after by multinational contractors and clients alike.

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