The Wranglers are a department in the Facility. As the name would suggest, they are responsible for recapturing the monsters that are released into the cabin once The Ritual is over.

On the whiteboard, they bet on the Angry Molesting Tree. In the novelization, Sitterson mentions A werewolf Wrangler, thus indicating there are seperate Wrangler subsquads each assigned to a specific Monster to recapture.