The supervisor helmet is a piece of headwear worn by Pitt raiders in the Fallout 3 add-on The Pitt.
It can be repaired with other supervisor helmets and provides a Damage Resistance of 5. It appears to consist of a gas mask and a hard hat fitted with a headlamp.
It can be found in several areas, such as on a Pitt raider positioned outside where Ashur usually stands (it can be acquired from him through killing him or reverse-pickpocketing better equipment).
It may also be bought from Friday, a vendor in the Downtown section of The Pitt, or looted from Pitt raiders during the fights in The Hole or the slave uprising.