Local government agencies in the United States often hire urban planners who are Canadian citizens. On the Canadian Institute of Planners page, there's a list of handy tips for Canadian urban planners who are seeking work in the United States.
Unfortunately, it seems nearly impossible for American planners to find work in Canada. From what I've seen on the Web, almost every local government in Canada has "must be a Canadian citizen" as a requirement for employment.
So ... why do Canadians seem to have unlimited access to job opportunities in the United States, including local governments, while Canadian local governments apparently prohibit the employment of United States citizens? We get Canada's comedians, newscasters and planners ... how come we Yanks can't go north of the border? Don't Canadians have to honor Appendix 1603.D.1 of NAFTA?
Nerudite ... how'd you get up north? Forged papers and a fake accent?