Martina also has extensive listed company experience, currently serving on the Board of AB Volvo and the Supervisory Board of Siemens AG. She is a former Board member at Imerys SA, SAF Holland SE, Deutsche Lufthansa AG, Thyssenkrupp AG and Bekaert SA. Sharon Thorne, a British citizen, is a Chartered Accountant and has had a 36-year career with Deloitte. She became an audit partner of Deloitte in 1998, held numerous Executive and Board roles, becoming Deputy CEO Deloitte North West Europe in 2017 and Global Chair from 2019, before retiring at the end of November 2023. She has also served on the Boards of the Confederation for British Industry, Prostate Cancer UK and the Social Progress Imperative. Rio Tinto Chair Dominic Barton said: "Martina has extensive leadership experience in handling cyclical businesses, navigating the energy transition and decarbonisation initiatives, and leading innovation and R&D efforts.