Sam Riggall is the chairman of Clean TeQ Holdings Ltd. He was previously executive VP of business development and strategic planning at Ivanhoe Mines and before that worked for over a decade at Rio Tinto in a variety of roles. He led the Oyu Tolgoi Investment Agreement negotiations with the government of Mongolia for Rio Tinto and Ivanhoe Mines to develop one of the world's largest copper-gold mines. Riggall is a director of Syrah Resources Ltd., which is currently constructing the world's largest graphite mine in Africa. A graduate of the University of Melbourne, he was awarded bachelor's degrees in commerce and law.