Demetrius is a consulting economic geologist who began his career in the West Australian nickel fields where he is credited with discovering the Dordie North nickel deposit for Anaconda Mining Inc. Since then Demetrius has worked for several major mining companies, including Esso Minerals, Chevron and BHP Billiton Ltd. in Australia, South America, and Africa where he was responsible for project generation, primarily for gold but also for base-metals. Demetrius was involved in the early identification and development of the Syama, Sadiola and Morila gold mines in Mali, Golden Pride in Tanzania, Essakan in Burkina Faso and Tongon in Cote d'Ivoire. He started a private exploration company, Sanu Resources Inc., in 1997, which went public in 2003 and in 2006 discovered the 30Mt Hambok massive sulphide copper zinc deposit in Eritrea. In 2008 Sanu was merged into NGEx Resources Inc., a Lundin Mining Corporation group company. Demetrius became VP Exploration of Corado Capital Corp, an exploration company spun out of NGEx in 2012. Corado was subsequently merged with Legend Gold Corp. in 2013 where he became VP Exploration. Legend was then acquired by Altus in January 2018. Demetrius is currently a director of Rhyolite Resources Inc., acts as a Qualified Professional for Revelo Resources Corp. and Atico Mining Corporation and is on the Advisory Board of Indigo Exploration Inc. Demetrius holds a Ph.D. in Geochemistry from Stanford University, has published research on epithermal 'bonanza' silver deposits in Peru at the American Museum of Natural History in New York, where he held the position of Assistant Curator and teaching at Columbia University as an adjunct professor in Economic Geology.