well just throwing out posiblitys.. not enorsing any of these in particualr but
Beurocracy and Admin, the knowlege of the proceedures and location of stored information, allows the holder to potentialy by pass lengthy beuracratic trails and or accuratly retive information
Logistics and Trade. Moden militarys life and die on logistics, getting the right equipment to the right place in the right order at the right time those nice shiny new warp parts deliverd to the Fward arming and refuling point? they just got blown up becuase the point derfences ran out of ammo…. that kind of stuff. in RP it woudl be about aquiring the things needed, posibly by the black market or beeing friendly with the supply officers (bribeing)
Marin trainng.. perhapse a misnomer. we will need some personal combat skills, it migth not be our perview but our ship/station could get boarded (ala the spys we had a few mounths back) Im sure the navey has tought everyone how to safely handle a pistol/rifle equivlent.. but soem will be better then others, some will have some unarmed combat training as well as a way to keep fit as much as anything else.
Demolition.. is again a maybe, Primary beams are a sledge hammer, sometimes you want a scaple, sometimes for soem reason the beams may not be an option. reember that scean in the undisoved country where Spock and Mcoy reprogram a torpedo so seek out a cloaked ship? that might fall under that catagory with some influances from others.
?My surgestion is we create 2 Major and 4 Minor for each station on a ship, and throw a few extra in like medical, xeno biology etc.