Dunelm said on Thursday that it has appointed former Dixons and Tesco executive John Browett as its chief executive officer designate.Browett will join the board on 1 July as CEO designate and will become CEO on 1 January 2016, following a six-month induction period with the current CEO Will Adderley, who will revert to his former position as deputy chairman.The company also said that William Reeve will join the board on 1 July as a non-executive director, while as previously announced, Andy Harrison, a non-executive director since September 2014, will take over as chairman on 8 July after Geoff Cooper's retirement.Browett spent his early career at Tesco, including appointments as strategy director, CEO of Tesco.com, and group operations development director. In 2007, he was appointed CEO at Dixons Retail, followed by his leadership role as senior vice president at Apple Retail and executive committee member at Apple Inc, and then CEO at Monsoon. He is a non-executive director of EasyJet.Chairman Geoff Cooper said: "John brings an exceptional combination of business leadership together with outstanding retail skills across a breadth of sectors, from grocery to electricals and fashion. John also brings proven experience of applying technology in multi-channel operations, which will help us accelerate our digital plans."Dunelm shares closed down 0.3% at 939p on Thursday.