You'll need also a Letter of employment for the time you were working for your employer, including NOC, Salary, duties, dates and worked hours. A job offer letter is a document that a Canadian employer gives you (as a temporary worker).It explains the details of your job. Hiring employees in Canada? Find out job offer requirements for Express Entry and who needs a Labour Market Impact Assessment (LMIA). Learn what to include in a job offer letter and use our ready made template. To offer a job to someone outside the country, an employer must prove that there is no Canadian willing or able to take the job. We've got the job offer letter templates you need to make your job offer stand out and provide a smooth experience for your new hire. To get a work permit, you must FIRST have a valid, usually LMIA-approved job offer from a Canadian employer. A work permit is a visa.