Richard Sillitoe graduated from London University where he earned a Ph.D. degree in 1968. After three years with the Geological Survey of Chile and a Shell postdoctoral research fellowship at the Royal School of Mines in London, he operated for more than 45 years as an independent consultant to mining companies, international agencies, and foreign governments. He has worked on a wide variety of mineral deposits and prospects in 100 countries worldwide, but focuses on the epithermal gold and porphyry copper environments. Published research has earned him awards in Europe, Australia, and North and South America, including the Silver and Penrose Gold Medals of the Society of Economic Geologists, of which he was President in 1999-2000.