Both army and naval intelligence prefer experienced personnel to transfer in - - it makes it easier to teach candidates how to assess an enemy battalion's likely courses of action, if one knows what a battalion is.
In the Reserves, and occasionally in the RegF for applicants with specific qualifications, the "previous-experience" requirement may be waived. Speaking for the Reserves only.....as a very broad generalization, if one is going to join without having served elsewhere first, it is more likely to happen with army NCMs and naval Officers, for several reasons.
Army Int Ops are going to undergo a significant amount of training, where all the basics are covered anyway (they'll just learn easier with previous experience). Army Int Offrs tend not to be as understrength, therefore the unit recruiters can hold out for experienced applicants, are less motivated to take people directly.
NavRes Int Officers is still a new and growing field. On the one hand, there is a back-log of former NCAGS/NCS-classified officers requiring training. On the other, there are a lot of line serials that need filling. As for Navy Reserve Intelligence NCMs, there aren't any....so there would be little competition if that's the route you really want to take.
As with Army Int, the best advice is to ask the person in your neighbourhood holding the chequebook. 6 Int Coy was given above. My Gitmo buddy was busy pulling out fingernails, so I had to google it myself, but HMCS Nonsuch is:
HMCS NONSUCH
11807 Kingsway Ave
Edmonton, AB T5G 2W5
Ship's office: (780) 452-8843
oh......and one recurring stumbling block for can be getting a security clearance. IF your dad is the local Tamil Tiger spokesman, your mom is North Korean...and you just moved to Canada on Monday, from Iran......joining the Intelligence Branch may be problematic - - you may want to consider Tim Horton's for your career-fulfilling aspirations