Brian O'Mahony

State Director

New South Wales

Brian is a trusted cost management specialist across commercial, mixed-use and student accommodation developments.

Having started his career in London in 2012, Brian brings extensive experience delivering strategic cost advice on complex projects across the UK, New Zealand and Australia. His expertise covers all aspects of quantity surveying and cost management, supporting clients from early concept planning through procurement, contract administration and final account reporting.

Since joining WT in 2017, Brian has played a key role in leading the delivery of major commercial office new builds and repositioning projects, large-scale mixed-use precincts, and student accommodation developments, including several landmark projects in Sydney’s CBD. He is known for his collaborative approach, technical excellence and commitment to helping clients achieve maximum value and strong project outcomes.

Brian was appointed State Director in 2025.

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