eligibility for canada visa permit and requirements

Eligibility
A permit for working in Canada rests upon a written job offer from an employer.
Once you have received such an offer, in most cases it is then subject to confirmation by Human Resources and Skills Development Canada (HRSDC) who will assess the likely impact of employing a foreign national in the position in question, to ensure that the employment is genuine and that it will not impact negatively on the domestic labour market.
HRSDC
Once HRSDC confirms that job offers may be filled by foreign nationals, applicants may request Canadian working permits from Citizenship and Immigration Canada (CIC).
Foreign workers seeking to work in Quebec will also require authorization from the Quebec immigration authorities.
Employers sponsoring a foreign national for a work visa in this way are responsible for ensuring that the candidate is in possession of the necessary permits and that they adhere to the appropriate conditions and limitations.