Good player roles on a starship?
Ok... I have a problem.
I'm about to start up my third Trek Campaign (all three taking place in the ENT-era) and I realise that in every campaign the players plays almost the same roles.
Captain
XO
Security Chief
CMO
I find it hard for them to play any other major roles on the ship.
The roles of communications officer, engineer or science officer are way more suited for npcs since treir main role is to use their instruments to inform the crew on what is going on.
Sometimes my players tells me that they would like to try on different roles but they understand as well as I do that it's not much fun to play a engineer or science officer and just repeat to the other players what I tell them they know...
Do you have any ideas for other characters that could work as senior crew or at least work along the senior crew (like for example Neelix did for some vauge reason)?