Bill Tieleman (born February 18, 1957) is a lobbyist and former NDP political strategist in Vancouver, British Columbia, Canada. He is known for opposing the 2009 referendum on electoral reform,[1] and the 2018 referendum on whether to hold a second vote to choose a proportional voting system.[2] Tieleman is also known for strongly advocating hydraulic fracturing to extract methane for export from British Columbia, and for denying the role of global warming in forest fires.[3] Tieleman supported the Site C dam [4] and opposed the 2017 confidence and supply agreement between the BC Green caucus and BC NDP caucus under leader John Horgan, which gave Horgan a legislative majority to become premier.