As noted above, all CF members must complete their IBTS qualifications. However, once those requirements are met, Intelligence reservists then focus on their own tradecraft (as would any specific trade.)
This includes Intelligence Preparation of the Battlefield and the development of products for the Operational Planning Process, development of adversary Courses of Action, preparing and delivering written Intelligence Summaries and Reports (INTSUMs and INTREPs). They prepare and deliver briefings to the CO or his designate as directed. Of course, the real work comes in when they have to collect, organize and analyse information necessary to get the content for those reports and briefs...