Mametja was appointed to the board on 17 January 2025.  Mametja brings extensive financial experience and expertise to the board having worked previously as an investment banker at Morgan Stanley and UBS AG, and as an auditor at KPMG. Her expertise spans audit, mergers and acquisitions, equity and debt, capital markets, corporate tax as well as BEE transaction advisory in a number of industries including mining, telecommunication, financial services and manufacturing. She is the founder and CEO of Moshe Capital (Pty) Ltd, a South African advisory and investment firm. She also serves as non-executive director of Impala Platinum Holdings Limited and Impala Canada Ltd.