Mr Tilk is an independent non-executive director. He is the former executive chair of Nutrien Inc., a Canadian global supplier of agricultural products and services based in Saskatoon, Saskatchewan. He is the former president and chief executive officer of Potash Corporation of Saskatchewan. Mr Tilk, previously spent 25 years with Inmet Mining Corporation, a Canadian-based, international metals company, with five of those years as the company’s president and chief executive officer. He is also a director of Emera Inc., a publicly listed energy utility company and the Princess Margaret Cancer Foundation, a not-for-profit organisation, which raises funds to support the Princess Margaret Cancer Centre.