| ||For other characters named Daniel, see Daniel.|
Daniel Koster was an engineer in Vault 87.
He was stationed in a small engineering room off the atrium's upper level. He grew more and more suspicious of the secret experiments conducted in the vault, eventually choosing to confront the responsible people after the mysterious death of his wife.
His safe is unlocked by accessing the last entry of his terminal.
Daniel Koster is mentioned only in Fallout 3.