Mark is a geologist with more than 29 years of experience in due diligence studies and Mineral Resource audits, underground and open pit production, resource development, resource estimation, consulting and geological management at operational and corporate levels. Mark has extensive experience in Western Australia gold, nickel, manganese and chromite grade control, mining, resource development and due diligence audits, along with consulting work in Mali, Tanzania, Ghana, Mozambique, Southeast Asia, Mongolia and Saudi Arabia. As Geology Manager for Sons of Gwalia and Consolidated Minerals he was responsible for operational performance from a number of operations and commodities, along with reconciliation, reporting, resource development, long term project planning and cost control. As a consultant, Mark Drabble specialises in realising value from geology in 3D modelling and Mineral Resource estimations. He has carried out due diligence audits, mineral resource estimation and sign-off, reconciliation reviews, grade control studies and high-level corporate presentations. Mark presents Snowden Optiro's professional development courses.