An overseer is the leader of a Vault-Tecvault. The overseers were often aware of their vault's purpose as an experiment and helped coordinate it.[1] The overseer's role and extent of his or her authority varied from vault to vault; in one vault an overseer might serve in a purely advisory capacity, while another vault might have an overseer with absolute control of every aspect of its residents' lives.
Dr. Stanislaus Braun distributed sealed orders to each vault's overseer in the weeks before the Great War. According to a letter addressed by Dr. Braun to the original overseer of Vault 101, disclosing the contents of those sealed orders to the vault's residents or deviating from the experiment were grounds for termination of employment from Vault-Tec.[2] This may have held true for the overseers of the other vaults.
↑Vault-Tec Workshop loading screens: "The Overseer is the person responsible for every aspect of a Vault's operation - including any bizarre social experiments cooked up by Dr. Stanislaus Braun, the Director of Vault-Tec's Societal Preservation Program."
↑Vault 101 terminals; Overseer's terminal, Letter from Doctor Stanislaus Braun