...choo!
Technically, 40% of the crew aboard any SF vessel has the necessary cross training to serve as medical personnel and a greater majority of the crews on any starship in the Federation are cross trained in other fields as well... just because your posted to TAC, for example, doesn't mean that you couldn't handle Ops or Conn or even Counseling for that matter.
Anyway, here's the thing: The Romulan contingent, envisioned as a contingent of no more than 6, were put on board as part of an 'exchange' between SF and the RSE - SF gets use of the cloaks for the mission into the GQ and, as a trade off, the RSE 'technicians' get to 'ride along' and observe (i.e. gather intel, etc, where appropriate). The contingent was conceptualized as being a group of 'technical advisors', and are not necessarily solely responsible for maintenance of the cloaks... Seeing as the RSE (along with the Cardassians) got their behinds handed to them the last time the made a trip into the GQ, I'd imagine that the Romulans (like Starfleet) would be more inclined to send 'expendables' through the wormhole as opposed to their 'best and brightest' - Hell Fleet gave command of one of the starships to a lowly commander with a lengthy record insubordination, violence, and complete disregard for politics and the other is headed up by a scarred, angry, and vengeful Captain with what some might perceive as a death wish...
Basically, the Romulans weren't originally expected to 'do much' other than bring the cloaks and be a burr in SF's butt (and depending on what actually transpires during the mission, either change the SF crews' 'low-opinion' of Romulans for the better
or reaffirm the general consensus that they're arrogant, shifty, traitorous bastards who are not to be trusted
ever and we don't care what SF or some paper alliance says... (this is the bit that I had inteded to leave up to the 'department head' of the Roms... are you there to help? are you there to sabotage? or are you just there because you were told to ride along and gather whatever intel you could 'just in case' Starfleet's mission succeeds and the Cerberus and Charon, by some chance, actually make it back? Are you funnelling intel back to the RSE and/or the Tal Shiar? Etc? Etc? Etc?)
So, basically, I guess, what I'm saying is, the Romulans really weren't envisioned in having a huge role in day-to-day operations aboard the ships (though, it may come to that on the other side of the wormhole) - they're more of a sub-plot unto themselves, really (can they/should they be trusted? Is the alliance a true collaboration or is it, as many SF personnel believe, simply political posturing and not worth the 'paper it's written on'? Etc...)... I just don't want to see the entire Romulan contingent filled up with PCs who might just find themselves bored to tears because they're way over qualified for a "suicide mission" into no-man's land/enemy territory... additionally, it's not outside the realm of possibility that
some characters are gonna get killed before all is said and done... both Fleet and RSE... something to bear in mind.