Mr Justin Sullivan

Justin is a leading independent expert witness and has attended numerous mediations, hearings and given evidence including in the UK Technology and Construction Court and in the High Court of Justice many times, most recently in 2024.

Justin sat on the board of Buckinghamshire New University as a Trustee and an independent member of council and the Hong Kong Metropolitan University International Advisory Board.

Acting as an expert witness for construction claims, Justin uses his in-depth construction industry experience when advising on adjudications, arbitrations and civil proceedings.

Justin provides detailed and comprehensive expert reports for construction disputes, particularly those relating to quantum, building time and delay defects, contracts, professional negligence, construction costs and fees.

He frequently acts as an expert and single joint expert and is regularly appointed as a party representative in adjudication proceedings by referring or responding parties. He is also often instructed by solicitors to support adjudication proceedings for claimants or defendants.

Justin has also acted in cladding and heat/power plant disputes, where he has represented a wide range of leaseholders, subcontractors and consultants.

Registrations:
• UK Register of Expert Witnesses
• Expert Witness Directory
• Cardiff University Bond Solon Expert Witness

Memberships:
• Fellow of the Royal Institution of Chartered Surveyors 
• Fellow of the Expert Witness Institute
• Fellow of the Institute of Quantity Surveyors International
• Member of the Society of Construction Law
• Fellow of the Quantity Surveyors International
• Member of the Academy of Experts
• Associate of the Chartered Institute of Arbitrators Member Society of Construction Law
• Liveryman of the Worshipful Company of Chartered Surveyor, the Worshipful Company of Constructors, the Worshipful Company of Arbitrators, and a Freeman of the City of London