1. Yes you can, but you need to already be a trained military pilot (from another nation) and be deemed skilled enough to warrant bringing in.
2. So long as you can offer useful service, the Compulsory Retirement Age is 60, but you have to qualify as per 1.
Are you or have you ever been a qualified military pilot? If not then you have to be a Canadian Citizen.
email the chap that looks after the programme at:
[email protected]