Rio Tinto names Chris Lynch as its new chief financial officer RIO Tinto has continued the rapid overhaul of its executive team, naming former BHP Billiton chief financial officer and Transurban chief executive, and current director Chris Lynch to replace longstanding chief financial officer Guy Elliott, who is also Rio's longest-serving board member. The surprise move comes on the heels of the replacement of former chief executive Tom Albanese with iron ore boss Sam Walsh in January, followed earlier this month by the elevation of copper boss Andrew Harding to the helm of the company's all-important iron ore division.