Foreign nationals can be hired in Canada on permanent basis through Express Entry system through the Federal Skilled Worker Program or Federal Skilled Trade Program or the Canadian Experience Class or through a portion of the Provincial Nominee Program.
As a Canadian Employer, you can hire Express Entry candidates to meet your labour needs when you cannot find Canadians or Permanent Residents to fill job vacancies.
As Canadian Employer, you are allowed to hire foreign workers through Temporary Foreign Workers Program (TFWP) OR International Mobility Worker Unit (IMWU) where ever and whenever they need it for the sake of Canadian Economy/Society.