Embodiments of the invention relate to systems, methods, and computer program products for the management of custodians within an electronic discovery system. Embodiments of the invention herein disclosed provide for methods of creating, maintaining, and utilizing a unified custodian directory for the purposes of carrying out electronic discovery within an enterprise environment. By employing a unified custodian directory to manage custodians apart from the electronic discovery cases to which they relate, the custodian management system of the present invention promotes efficiencies in the field of electronic discovery.