Its Ontario!!!u2026if you Map the Manufacturing sector of the Canada..Most of it is situated in the Ontario province. The main reason to it is as this province is very near to the Michigan,USA therefore procurement of the parts will not take much of the time.Apart from this most of the product manufactured in Canada are exported or sold in USA Therefore Location plays a very important role. As Ontario is close to East coast and more close to USA and Detroit(USAu2019s Mechanical HUB) therefore most of the manufacturing industry is situated there. Therefore Ontario has the best scope for Mechanical engineers.Other than Ontario, Quebec seems to be an good option. Most of the aerospace industry is based there. If you are interested in Oil, Mining and Gas then Alberta will fit into your choices.I hope i have answered your Question.