Search the major sites like workopolis.com and monster.com. Do searches for LMIA jobs on the classified sites like kjiji.com and craigslist.com. Other sites to consider are jobsaloon.com, eluta.ca, and jobclassified.ca.
Since 2 years have passed since the last reply in this thread, I am locking it to prevent necroposting. Feel free to start a new thread or contact any forum staff if you want this to be reopened.