Gary Blackburn is a practising quantum and delay expert and a highly experienced chartered quantity surveyor with extensive knowledge of the analysis, preparation, defence and negotiation of construction claims.

With 31 years’ experience across building, civil engineering, infrastructure, utility, rail, marine, power, process, petrochemical, and oil and gas sectors in the UK, Europe, Africa and the Middle East, he is one of the few experts capable of acting as quantum or delay expert, providing a practical and focused approach derived from his extensive project experience.

Gary typically works with leading domestic and international construction and engineering clients on matters including delay, critical path analysis, cause and effect, concurrency, extensions of time, disruption, acceleration, loss and expense, valuation of variations, valuation of measured works, prolongation costs, lost productivity and loss of profit.

His clients benefit from his insight gained in senior positions with both contractor and consultant organisations and his broad range of sector experience. He is an accredited expert with experience of litigation, arbitration, adjudication and mediation, including concurrent expert evidence or “hot tubbing” in arbitration hearings.

He has acted as expert adviser and expert witness on behalf of contractors, subcontractors and employers and provided expert opinion in respect of quantum, disruption and delay in large complex disputes involving multidisciplinary teams.

Recent experience includes waste to energy plants, marine salvage work, motorway infrastructure, professional negligence, gas refinery and education facilities, both domestic and international.