Industry Advisory Board
Rigoberto Rimmelin
Global Practice Lead Geotechnical
With over 20 years of global experience in both Underground and Open Pit mining, he leads global continuous improvement in geotechnical engineering, including strategy, risk management, and value, leads the development of standards, promotes their implementation across the business, and provides assurance. He has developed an internal and external network of geotechnical professionals promoting a culture of excellence and continuous improvement as a trusted advisor across BHP Regions of Minerals Americas, Minerals Australia and Petroleum and providing expert advice for independent Peer Reviews and other reviews as required.
Sarah Webster
Principal Caving Specialist
Geomechanical engineer with 25 years of experience spent at open pit, stoping and caving operations. She has led the Life of Mine Studies Team at Northparkes to evaluate and deliver the future caving projects for Northparkes. Sarah has a master’s degree in mining geomechanics from the Western Australian School of Mines and is studying a PhD at the Australian National University.
Ian Edgar
VP Underground Strategic Planning
Mining Professional with over 20 years in the international minerals industry with knowledge and experience of operations, maintenance, studies, and projects. Vice President Underground Planning for Freeport-McMoRan, Accountable for medium and long-range planning and design for PT Freeport Indonesia’s underground mining operations including GBC, DMLZ, BG and KL. Development of strategic alternatives to support evaluations of expansions.
César Pardo
Corporate Geoscience Manager
Mining Engineer with a Master of Engineering Science in Mining Geomechanics and a PhD in Rock
Mechanics. Over 20 years of professional experience as Geotechnical & Geomechanical Engineer
working for complex Underground operations in Chile and Australia. Significant exposure leading a
Geotechnical team in a Large Block Caving Operation characterized by high stresses and active
seismicity environment. Experience to lead Geotechnical teams for supporting the Order of
Magnitude, Pre-Feasibility and Feasibility studies of massive Underground Projects.

