Sam Walsh AO (born 27 December 1949) is an Australian businessman who was elected to the Mitsui & Co board as a non-executive Director on 21 June 2017.
Prior to this he was chief executive officer (CEO) of London-based mining company Rio Tinto Group, from 2013 to 2016.Prior to becoming CEO of Rio Tinto, Walsh served as Rio Tinto chief of the Iron Ore group, and of Rio Tinto Australia.
Based in the Australian city of Perth, he oversaw company's mining operations and expansions in Pilbara, Western Australia.