Certainly. Many soldiers sent to the missions in Rwanda and Somalia came back with post-traumatic stress syndrome. The mission to recover the bodies of victims from the crashed Swissair Flight 111 also traumatized some rescue workers. It depends on the incident and on the individuals involved.
Do not forget that 90% of Canadian Forces personnel are not deployed. People can be involved in a car crash or be attacked as they are driving. All sorts of events can cause post-traumatic stress disorder. Women and men can be raped. There are many things which can cause Canadian Forces members to suffer from post-traumatic stress syndrome.