this is info from an Australian Institute.. but here u go anyways it explains some stuff 
http://www.aic.gov.au/services/careers.html
 Edit:
here's a Canadian link 
http://www.nelson.com/nelson/harcourt/criminology/career.htm
and here is a list of careers i found on this 
site:
    *   Police officer
    * Detective
    * Criminal investigator
    * Corrections, Parole, or Probation officer
    * Warden
    * Security investigator or specialist
    * Lawyer
    * Legal assistant
    * Court administrator Judge or Magistrate
    * Federal government [FBI, CIA, ATF, Customs, Secret Service, INS, Border Patrol, Drug Enforcement]
    * State [state trooper, SBI agent], Local law enforcement agencies, Arson specialist, Serology specialist or Fingerprinting specialist.