Find out job offer requirements for Express Entry and who needs a Labour Market Impact Assessment (LMIA). For Offer of employment, You must provide a job offer letter from the employer who wants to hire you.An offer letter provides a brief overview of the position and company and includes specific job details, such as start date, salary, work schedule and benefits. You must provide a job offer letter from the employer who wants to hire you. Your Canada job offer should be written on official company letterhead with contact information, including registration and contact number. Canadian employers cannot apply for a work permit on your behalf. That is illegal in Canada. The employer making the job offer has obtained a positive Labour Market Impact Assessment from Employment and Social Development Canada. What is included in a job offer letter? Job offer letters will vary based on how much information you wish to include.