Engineer Geoffrey McDonald Day, an Australian national, is a geochemist with over 35 years of experience in the mining industry worldwide. His expertise encompasses all phases of mining, starting from exploration, through all mining and processing operations, and technical services, to mine closure and rehabilitation.  Additionally, he has extensive experience in mergers, acquisitions, and external affairs.

Engineer Geoffrey has worked in various regions around the world, including Australia, Papua New Guinea, Indonesia, North America, South America, Africa, and Europe.

He holds a Bachelor of Applied Science and Master of Applied Science in Geochemistry from Deakin and Monash Universities, and has undertaken postgraduate studies in Geology and Geophysics at the University of California, Berkeley.