Mark is a member of the Board and Group Management Committee (GMC), is a non-executive director of Anglo American Platinum, Chairman of Anglo American South Africa (AASA) and Chairman of De Beers. He was appointed as an independent director of Total S.A. on 26 May 2017 and The Power of Nutrition on 12 February 2018.

Mark was previously CEO of AngloGold Ashanti Limited, a position he held from 2007-2013. Before joining AngloGold Ashanti, Mark was COO at Vale Inco where he was responsible for Vale's global nickel business. Prior to this he held senior executive positions with the Normandy Group, Sons of Gwalia, Western Mining Corporation, Kalgoorlie Consolidated Gold Mines and CRA (Rio Tinto).

Mark graduated from Wollongong University, New South Wales, with a BSc in Engineering and holds two honorary doctorates awarded by Wollongong and the Laurentian University in Canada.

Bernard is the Chairman of the annual Junior Indaba and Joburg Indaba as well as an Executive Director of the SBI. He is a Partner at To-The-Point Growth Specialists as well as a Partner in THINKspiration. He served as Non-Executive Director on the boards of Impala, Zimplats, Eqstra and African Rainbow Minerals Limited. Previous roles include Chief Executive Officer and Chairman of Village Main Reef Limited and CEO of Harmony Gold Mining Company Limited. He is Chairman and Managing Partner of MMC (Manganese Metal Company) as well as a non-executive director of African Rainbow Energy Producer (AREP).