For an adventure I am working on I need to develop some information about the research branch of the Jovian Republic space navy. Obviously they are involved in all sorts of fun stuff - after all, these are the people who are supposed to come up with defences against all the horrible posthuman tech out there. However, the main problem I have right now is researchers in the field. Suppose you have a military-run operation investigating something classified. Would the JRNRA scientists be warrant officers? I remember from Bruce Sterling's Schismatrix that the protagonist at one point became colonel-doctor if I remember right. It is an intriguing title for a military-academic complex. Could one use something similar here? I am fairly clueless about the intricacies of military and semi-military rank.