You should apply for your work permit before you travel to Canada. However, you can apply for a work permit when you enter Canada if you're eligible.A job offer letter is a document that a Canadian employer gives you (as a temporary worker). It explains the details of your job. All UM offer letters are required to use consistent wording to specify employment eligibility and regulatory immigration requirements. We have created this step-by-step guide to moving to Canada from the US. Read on to learn more about your Canadian immigration options as a US citizen. The only correct answer is "no". You will need the company to sponsor you, you need to let them know. Here's everything you need to send a legally compliant offer letter to hire a fulltime employee in Canada. This comprehensive CanadaVisa page covers the range of Canadian immigration, work, study, and citizenship options available to those in the US.