Construction
Dispute
Specialists

Quantum and quantity surveying expert services

GTQ Expert Services provide quantum and quantity surveying services for engineering and construction projects in the oil and gas, civil engineering, building, transport, and heavy industry sectors.

Our team provide a range of services including dispute avoidance and preparation, and appointments as the quantum expert witness to some of the most high profile projects across the globe.

GTQ Expert Services is regularly appointed to disputes determined in international arbitration, supreme court litigation, domestic arbitration, adjudication, and other similar forms of dispute resolution.


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Experience



Local and international

Based in Brisbane Australia, GTQ Expert Services holds a depth and wealth of local and international experience on disputed projects in Australia, New Zealand, PNG, Malaysia, Indonesia, Hong Kong, Singapore, South Korea, United Arab Emirates, and Africa.

Multiple sectors

Extensive experience across multiple sectors including oil and gas, civil engineering, building, transport, and heavy industry sectors. GTQ Expert Services draws on actual site and project experience in both the engineering and construction fields to disentangle complex issues and provide practical advice and evidence.

Distinguished clients

Our team has produced reports and submissions for many of the world's leading contracting organisations and lawyers, including law firms in the Magic Circle.

Leading expert
Graham Topp

Graham is a Fellow of the Royal Institution of Chartered Surveyors, and a registered expert witness, certified quantity surveyor and Fellow of the Australian Institute of Quantity Surveyors.

Graham is involved in the preparation, analysis, and submission of expert witness reports, addressing issues of quantum. He is retained to prepare reports on construction and engineering disputes in domestic and international arbitration, litigation, adjudication, and expert determination.


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Latest GTQ news

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Quantum wordbite: costs to complete – key considerations


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Quantum wordbite: the valuation of actual cost claims
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Quantum wordbite: the valuation of actual cost claims