Rayleen Hargreaves is a Principal Consultant and Product Owner with over 30 years of experience in mine geology and reconciliation across open pit and underground operations. A Chartered Professional (MAusIMM CP(Geo)) and PRINCE2 Practitioner, she has led global projects focused on improving data integrity, process integration, and value chain transparency. Rayleen co-authored the 2014 Universal Reconciliation framework, now referenced across the mining industry, and continues to advocate for standardised and proactive reconciliation practices. She currently leads the development of reconciliation technologies that help operations close the loop between model, plan and reality, driving more confident reporting and operational decision-making.

Joyce Chung is a Global Technical Advisor – Optimisation at Deswik Consulting, based in Perth, Australia. With a background in mining engineering, she specialises in strategic mine planning and mathematical optimisation across commodities such as gold, copper, nickel, and iron ore. Joyce focuses on bridging advanced optimisation algorithms with practical planning workflows to maximise value and efficiency. She regularly contributes to industry thought leadership, presenting on topics including Direct Block Scheduling (DBS), NPV optimisation, and strategic decision-making in mine planning.

Geoscientist with 20 years of experience in the exploration and mining industry. Born in Chile and graduated as a geologist, with experience in mine geology and resource estimation in two giant Cu-Mo porphyry deposits. Later moved to Australia to complete a PhD in geochemical exploration within a skarn environment. Since then, has worked as a geoscience specialist on Rio Tinto’s copper and iron ore project developments.

Matthew Crowther graduated from University of Wollongong with a Bachelor of Medical Radiation Physics (Advanced) Honours (First Class) in 2020. He started working as a Research Technician for the Magnetic Resonance team at CSIRO Mineral Resources Lucas Heights in 2021. As part of his work, Matthew has been applying his physics skill for detection and quantification of minerals using magnetic resonance. A major focus of his was his contribution to the Haul Truck Sensor for measuring chalcopyrite in 200 tonnes of ore in mining trucks in Zambia. More recently, Matthew has turned his focus to the iron ore industry, investigating how magnetic resonance could be applied to benefit the processing of magnetite.