Designation Principal Consultant

Sarah de Vries

Sarah de Vries is a Principal Consultant based in Perth, focusing on Mine Electrification. With over 15 years of experience in open pit and underground operations across Australia and Africa, she brings a wealth of knowledge to the role. Over…

Fabrício Aragaki Carvalho

Fabrício is a Mining Engineer with more than 15 years of experience in the mineral industry. He is a Principal Consultant based in our Brazil office. Fabrício is specialized in surface and underground mining and have conducted numerous studies for…

Richard Fry

Richard has been involved in the field of geotechnical engineering, principally for mining and tunneling projects for more than 35 years. He has worked on projects in the UK, Ireland, Australia, Africa, S America and Asia. He joined Snowden’s Brisbane…

Pablo Borges

Pablo is a Principal Resource Geologist based in Brazil. He has more than 15 years’ experience in Mineral Resources estimation, Mine Geology and Exploration for gold and copper deposits. He’s worked at Jacobina Gold Mine for Yamana, Córrego do Sítio…

Matthew Cotterell

Matthew is a mining engineer with more than 25 years’ surface mining industry experience, with almost 20 years in a consulting role. Since joining Snowden, now Snowden Optiro, he has worked on numerous studies from scoping to feasibility level standard…

Jane Levett

Jane is an Associate Principal Consultant in the Geology division. She has more than 20 years of experience in exploration, mine and resource geology working with companies including Gold Road, Gold Fields, Newcrest, Rio Tinto, and Optiro. She has geological…

Vince Agnello

Vince Agnello is a Competent Valuator (CoV) and consultant to the mining industry. He has more than 20 years’ industry experience; with 16 of those years as a CoV in all major commodities, minor minerals, and within a host of…

Matt Walker

Matt Walker, Principal Consultant with Snowden Optiro’s Geology Advisory, is a geologist with more than 14 years of experience through the mine cycle chain, covering production, resource definition and resource estimation across a variety of projects, commodities, and continents. Matt…

Jan Graham

Jan is a Resource Geologist with more than 17 years’ experience working in the mining industry and has excellent technical skills. Through her work as a consultant at Mining Plus, Snowden Group, Right Solutions and Datamine, Jan has gained experience…