Police officers protect the public, detect and prevent crime and perform other activities directed at maintaining law and order.

• Patrol assigned areas to maintain public safety and order and to enforce laws and regulations
  
• Investigate crimes and accidents, execute search warrants, secure evidence, interview witnesses, compile notes and reports and provide testimony in courts of law
  
• Apprehend and arrest criminal suspects
  
• Provide emergency assistance to victims of accidents, crimes and natural disasters
  
• Participate in crime prevention, public information and safety programs
  
• May supervise and co-ordinate the work of other police officers.
  

Community relations officer - police
Constable
Crime prevention constable
Crime scene technician - police
Detective - police
Highway patrol officer
Police cadet
Police officer
Railway police officer
Royal Canadian Mounted Police (RCMP) officer

Police officers are employed by municipal and federal governments and some provincial and regional governments.