Can I work in the United States after successfully immigrating to Canada?

You can't enter and leave the United States freely with a maple leaf card, and you need a visa. If you have a stable job in Canada, you can apply for a valid entry and exit visa in 2008 or 10 if you have a company certificate (obviously afraid that you will work in the United States). If you become a Canadian citizen, you are free to enter and leave the United States. You can find a job in America. The welfare is not as good as Canada, but the salary is better and things are cheaper.