A work visa allows foreign nationals to work legally in the USA or Canada. In the USA, common work visas include the H-1B (for skilled workers), L-1 (intra-company transfers), and O-1 (extraordinary ability). Canada offers the Temporary Foreign Worker Program (TFWP) and the Express Entry system for permanent residency. Both countries require employer sponsorship in most cases, along with proof of qualifications and job offers. Processing times and eligibility criteria vary based on the visa type. It’s crucial to follow immigration regulations and consult official government websites or legal experts to ensure a smooth application process.