The NCR CF administration is a building inside the NCR Correctional Facility in the Mojave Wasteland in 2281. It's the office of the Powder Gangers leader Eddie, who's residing on the second floor with other gang members.
Upon entering, the player character can advance forward towards a medical bay, where they will find Hannigan. To the left of the medical bay is the kitchen. The entrance to the immediate left leads to the stairs accessing the second floor. Eddie can be found in one of three small rooms on the second floor.
Lying, Congressional Style - On the second floor, in the left-hand side room, on the desk furthest from the stairs
NCR CF administration appears only in Fallout: New Vegas.