Labour Market Impact Assessment (LMIA)

Most employers need a Labour Market Impact Assessment, LMIA for short, before they can hire a temporary worker
Before you start the job-seeking process, you must find out if you need an LMIA.If you do need an LMIA, the employer will need to hire a temporary worker through the Temporary Foreign Worker Program (TFWP)
You must obtain an LMIA from Employment and Social Development Canada(ESDC) before you can apply for an employment-specific work permit
A positive LMIA will show that there is a need for the foreign worker to fill the job an employer is offering and that there is no Canadian worker available to do the specific job.
The process of LMIA normally takes up to 5 months

Post-Graduation Work Permit Program holders do not need a LMIA.
Obtaining LMIA is the responsibility of employers, not foreign workers.
If you are especially skilled, you don’t have to be physically in Canada to be given a LMIA.