The Vault 101 security is a department in Vault 101. This department enforces the overseer's word as law in the Vault. Officers in are hand-picked by the overseer himself for their discretion and loyalty. They are the only residents with authorization for carrying firearms, besides the overseer. Vault security have a office located in the upper level. The overseer commands the security force with the chief of security acting as his representative in his absence. Most of the officers obey the overseer without question and have no qualms in injuring or killing residents during a crisis.