Joe Palmer was a resident of Vault 101.
If the G.O.A.T. names the career position of the Lone Wanderer as a jukebox technician, Edwin Brotch will express his relief. He will say that since Joe Palmer died, the jukebox in the diner has been in need of repair. Now, with a new technician to fill his vacancy, there is a hope, Mr. Brotch expresses to the Lone Wanderer, that the jukebox will be repaired.
Joe Palmer is mentioned only in Fallout 3.