In most cases, any of the forensic disciplines described on this website, require first a degree in that field (anthropology, medicine, etc.). After that it is possible to specialize in forensics. The University of Toronto has a great starting point in their Career Centre describing how to proceed with forensic sciences, click here to check it out!
Gail Anderson, of the Canadian Society of Forensic Science also provides some information on their site that can be helpful in steering you in the right direction in terms of Forensic Science employment, click here to check out her summary.
Here are some links to a few employers in forensic science in Canada: