I copied this from Alberta's immigration website "You can also contact the CIC temporary foreign worker unit to determine if your prospective worker is LMO-exempt."
You should have your prospective employer call the number for your province to be sure. The job title does not have to match but the job duties do. Then all you need is letter of the job offer and whatever supporting documents are needed and apply for your permit at POE.
If you aren't already familiar with it, you may want to check out the Foreign Worker's Manual.
http://www.cic.gc.ca/english/resources/manuals/fw/fw01-eng.pdfNAFTA info starts on page 155.