Library and Archives Canada holds WWII records, but they are restricted until 20 years after death of the individual. Small amounts of info will be provided prior to the 20 years date, but to get the whole file, the individual must be deceased more than 20 years.
Here's a link to the LAC that describes post WWI records and access procedures. I also agree that if he served with a Calgary based troop, the Military Museums might be able to provide at least a snapshot of what he experienced.