Dr John Clarke holds a Bachelor of Science in Metallurgy from University College Cardiff, a PhD in Metallurgy from Cambridge University, and an MBA from Middlesex Polytechnic.
He began his career as a metallurgist in 1972, which focused on the operation, development or management of African mining projects and activities. He held various roles from junior operating roles to the most senior executive and board level appointments.
Dr Clarke was executive director of Ashanti Goldfields, chief executive of Nevsun Resources which is an exploration and development company engaged in gold and base metals exploration and development in Africa, and president & chief executive of Banro Corporation having been a non-executive director 9 years prior.