About
James Dunphy Advisory
Specialist Quantum Advisory
JDA is an independent quantum expert practice specialising in construction and infrastructure disputes.
The practice provides clear, well supported quantum analysis for use in formal dispute processes, from claim development through to expert evidence.
JDA has assessed claims and prepared quantum reports on matters exceeding $1 billion and is regularly appointed by law firms across infrastructure, building and insurance related construction claims.
James Dunphy
James Dunphy is a globally experienced Chartered Quantity Surveyor and Quantum Expert with 28 years of experience across major projects in Australia and internationally.
He has prepared nearly 40 independent Expert Quantum Reports and has provided expert evidence in adjudications, mediations, arbitrations, conclaves and tribunal proceedings.
His experience includes claims and cost matters ranging from $100,000 to over $500 million across infrastructure, building and resource sector disputes. He has also prepared over 30 cost advice reports for funding, refinancing and project repositioning.
Before establishing JDA, James held senior commercial roles within tier one and international contractor organisations, as well as senior positions within Australian consultancies, working on complex and distressed projects.
This background provides a practical understanding of how projects are delivered, how costs are incurred and how commercial positions are developed and challenged in practice.
What Sets JDA Apart
JDA combines independent expert capability with genuine contractor side commercial experience.
JDA provides direct, senior level quantum expertise on construction disputes, delivering focused and commercially grounded analysis.
Having spent over two decades within contractor organisations delivering major projects, his analysis is grounded in how projects are actually delivered, how costs are incurred and how contractual mechanisms operate in practice.
The focus is on:
- Clear and robust quantum analysis
- Commercially credible positions
- Detailed interrogation of cost and entitlement
- Opinions that withstand scrutiny in adjudication and formal dispute processes
JDA is engaged on complex matters involving significant sums, where the analysis must be both technically sound and commercially realistic.