Unifor represents over 6,000 members working in mining and smelting. The sector includes non-petroleum mining, such as potash, as well as aluminum and non-ferrous smelting operations. Today, half of Unifor members in the sector work in Québec and B.C. for the global giant Rio Tinto. Around 1500 work for potash companies in Saskatchewan and another 1000 members work for Xstrata in Sudbury. Workers in a number of smaller mines make up the rest of the membership.