As the Quick Reaction Force, your two major responsibilities is monitoring (and repairing) the life support systems and taking care of any other serious, urgent maintenance tasks such as emergency repairs or extraordinary physical incursions. You might not be as hard hitting as the SURFOPS teams, but at least you know how to deal with problems without resorting to explosives and automatic fire.
You’re the first defence against incursions from the hostile outside, and you’re also the people keeping this place running. This work entails going over the entire outpost, paying extra attention to air vents, looking for spore infestations. Should you find any, Science needs to be called in so they can get a sample, and then it’s up to you to sanitize. Scrubbers know all the nooks and crannies of the Outpost, and it’s rumoured that some Scrubbers have a secret still somewhere, making a strong but bitter booze.
These are the maintenance/electricians/mechanics of the outpost, rewiring faulty wires, fixing engines, taking care of water recycling and keeping the place tidy. You will be the people having access everywhere, and knowing everything.