Under the National Defence Act, since Bill C-25 in 1998, the Director of Military Prosecutions is responsible for preferring charges at courts martial, so he or she is the statutory prosecutor for the Canadian Forces.
The system is very much structured on a Director of Public Prosecutions model, that is to say to provide the functional independence required for prosecutorial independence. The DMP occupying that position provided by statute is responsible for selecting, with the concurrence of the JAG obviously, the appropriate personnel that he or she considers are best suited to perform that prosecution function. Like a DPP in a civilian system, they seek to recruit people they think are best suited to provide that function.