SYDNEY--Rio Tinto's (RIO, RIO.AU) chief financial officer of 10 years will retire at the end of 2013, the company said Thursday. Guy Elliott, who will remain on the boards of Rio Tinto PLC and Rio Tinto Ltd. as senior executive director until the end of next year, will continue as CFO until a successor is appointed, the company said in a statement. There will meanwhile be a shake-up across the senior management team, with three other roles on the executive committee changing, it said. Energy Chief Executive Doug Ritchie will be appointed to a new role overseeing group executive strategy. His successor will be current diamonds and minerals Chief Executive Harry Kenyon-Slaney. Iron ore international operations president Alan Davies will take over the diamond and minerals role, as well as take up a position on the executive committee, Rio Tinto said. Write to Rhiannon Hoyle at rhiannon.hoyle@wsj.com