Ciaran O’Sullivan

Quantum Expert

Expert Highlights

  • Over 10 years of experience in mining and resources and building sectors
  • Proven ability in contract and claims negotiations, management of change, contract administration, measurement, quantum, and other related commercial and quantity surveying functions
  • Previously managed a suite of contracts (representing the Client) from pre to post award to close out/handover which were administered by the EPCM Contractor
  • Specialising in quantum construction claims in preparation of expert witness reports

Ciaran is a senior commercial professional with extensive experience working within Western Australia’s natural resources sector, namely iron ore and lithium which includes pre and post contract experience on major projects from bulk earthworks, structural mechanical and piping to non-process infrastructure buildings and facilities.

His experience covers quantification/assessment and negotiation of claims post award in addition to specialising in quantum assessment for preparation of expert reports.


Master of Laws Construction Law and Arbitration
BSc (Hons) in Quantity Surveying

Professional Memberships

Member of the Chartered Institute of Arbitrators (MCIArb)
Member of the Society of Construction Law Australia (SoCLA)