Dr Holden has 30 years of industry experience in mineral exploration and exploration technologies. He has worked in North America, the Pacific and Australia, where he has been involved in discovery stage copper, gold, silver, molybdenum and platinum group elements deposits. He specializes in regional to local scale targeting using the integration of geology, geophysics and geochemistry. He is a past Vice President of Geoinformatics/Fractal Geoscience and a former CEO of a publicly listed gold explorer (ABM Resources NL). Dr Holden currently runs exploration advisory business GeoSpy, and is a co-founder of private project generation businesses Marlee Minerals and Odette Geoscience.