\r\n \r\n \r\nMostyn has extensive experience in corporate and operational finance, having previously worked on major capital projects and organisational alignment, with substantial experience in South Africa.\r\n \r\nCommenting on the appointment, Philippe Mellier, De Beers Group's chief executive officer said: "I am pleased to be able to add Gareth to De Beers' management team. He is already familiar with our business, and will bring that knowledge, hands-on experience and proven track record to the role. As chief financial officer, Gareth will be instrumental in sharpening our strategic focus and helping to identify value creating opportunities."\r\n \r\nMostyn commented: "I am grateful for the confidence placed in me by Philippe and De Beers' shareholders. This is an exciting time for the diamond business and we have a unique opportunity in front of us to secure De Beers' long-term leadership position in this changing market. I am thrilled to be joining an iconic company with a strong heritage and incomparable product, and look forward to working with our producer partners, sight holders and colleagues to build on our shared success."