Here's a great tool that searches through current job postings from numerous Canadian government and private sector job search engines such as www.monster.ca, www.jobbank.gc.ca, www.workopolis.com, etc...
Start your Canada Job Search now
http://www.canadavisa.com/career_zone/canadian-immigration-job-search.htm
But for those who are not yet in Canada can we still use the search tool to secure a job?