If you are Canadian or Mexican with a job offer in the US, you may be eligible for a TN Visa under the USMCA (NAFTA) agreement. This application process is the fastest way to get a US Work Visa.
If you are being transferred to an existing US business, the L-1 visa is most likely the best type of US work visa for you. L-1 visas are available to employees working for companies outside the United States such as in Canada that have branches, subsidiaries, affiliates, or joint venture partners in the United States.
The E-3 visa is a US immigration option that gives eligible Australian nationals the chance to work in the US within their specialty occupation. The visa was created by an Act of the United States Congress as a result of the Australia–United States Free Trade Agreement (AUSFTA), although it is not formally a part of the AUSFTA.