For Canadian and US (and Mexican) citizens, the relevant visa is the TN visa that is part of NAFTA. https://www.uscis.gov/working-in-the-united-states/temporar

For Canadian and US (and Mexican) citizens, the relevant visa is the TN visa that is part of NAFTA. https://www.uscis.gov/working-in-the-united-states/temporary-workers/tn-nafta-professionals https://www.uscis.gov/working-in-the-united-states/temporary... https://www.canadianimmigration.com/working-in-canada/nafta-work-permit/professional/ https://www.canadianimmigration.com/working-in-canada/nafta-... For the US -> Canada route: > One of the benefits of applying for a NAFTA Professional work permit is that applicants are exempt from the Labour Market Impact Assessment (LMIA) requirement. Further, professionals who are destined to work in Quebec are also exempt from the Quebec Acceptance Certificate (CAQ) requirement. NAFTA Professional work permits are only for individuals entering the Canadian labour market temporarily, and their work permits cannot be longer than 3 years in duration. Immigration visas, however, would be different and go through a different approval process.