Dr Bierlein is a geologist with 30 years of experience as a consultant, researcher, lecturer and industry professional. Dr Bierlein has held exploration and generative geology management positions with QMSD Mining Co Ltd, Qatar Mining, Afmeco Australia and Areva NC, and consulted for, among others, Newmont Gold, Resolute Mining, Goldfields International, Freeport McMoRan, and the International Atomic Energy Agency. He is currently a Non-Executive Director of PNX Metals Ltd, was previously a Non-Executive Director of Gold Australia NL, and chaired the Advisory Board of a Luxemburg-based private equity fund between 2014 and 2021.