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The wife can return to Canada as of right and work whenever she wants to.
She can sponsor her husband under a spousal sponsorship for permanent residency. That will take many months though.
Or you can give the potential employee a job offer, obtain a labour market opinion from the government and then he can apply for the a temporary work permit.
Here is the information they will need if they want to do the spousal sponsorship:http://www.cic.gc.ca/english/immigrate/sponsor/spouse.asp
Here is what you will need about the labour market opinion:http://www.cic.gc.ca/english/work/employers/lmo-basics.asp
And here is what he will need about the temporary work permit:http://www.cic.gc.ca/english/work/
Let me know if you need any further clarification.