If you have the right to live and work in Canada regardless of your birth place etc, you can be employed at any company. I know a few guys from the UK in the process of going west. As ex RAF types, with degrees and high levels of experience AC will want to look at them at some point.
It goes both ways as Canadian guys come to England.
Anyone thats got a problem with this should keep it to themselves as it could be harmfull to your career.