Melanie Naidoo-Vermaak was appointed as the Chief Sustainability Officer on 1 January 2024. Her expertise in sustainable development has been built over 21 years in the private mining and public sectors in South Africa as well as in international environmental management exposure gained in the United Kingdom, Australia, Papua New Guinea, Fiji and in Africa. Before joining Sibanye-Stillwater, she worked at leading international mining companies, including Harmony, De Beers Consolidated Mines Limited, BHP Billiton Limited and Anglo American PLC. Melanie is a member of the Minerals Council South Africa’s environmental policy committee. Melanie held various directorships in her capacity as Senior Executive and Prescribed Officer at Harmony. These included Chemwes Proprietary Limited, Covalent Water Company Proprietary Limited, First Uranium Proprietary Limited, Nuclear Fuels Association of South Africa Proprietary Limited, Tswelopele Beneficiation Operation Proprietary Limited, Platistone Kalgold Proprietary Limited, Golden Core Trade and Invest Proprietary Limited, Harmony Moab Khotsong Operations Proprietary Limited, Mine Waste Solutions Proprietary Limited, Margaret Water Company Non-Profit Company, Virginia Jewellery School Non-Profit Company, Virginia Sports Academy Non-Profit Company, Harmony Community Trust, Harmony Environmental Trust, Harmony Social Trust and Wonderfontein Trust.