Last time I checked the MND was a civvy
It's much rarer (pretty much to the point of non-existence) in the combat arms but civilians hold supervisor positions all throughout the Department of National Defence. They manage both military and civilian pers, right up to the point of writing PERs. They can be the equivalent of CO's of units (CFADs Bedford and Rocky Point come to mind), or the supervisor of a R&D section in Supply. Depending on the level of competence, and more importantly, dedication the military members PER may be significantly guided by the next higher military member in the CoC.