Sci officers are fine. They're the bloody tanks. Get a medic kit and spam heals on yourself. The big heal halves all incoming damage. Hey, with it I even survived an exploit attack once! Amazing!
But yeah, joking aside, they're pretty useless at actually killing anything since the worst kit they've got has a hold but not enough damage buffs to make use of that. Oh well, we can always join in the riflebutting idiocy, 10% chance to expose plus spam knockdown and holds! And can be used with every weapon in the game! Cryptic sure was nice to make sure the battlefield is just full of annoying CC all the damn time, yup.