The Central Security Service (or CSS) is an intelligence agency employed and operated by the United States Government. It is branch of the National Security Agency, performing covert intelligence support for the United States Military. Its head office is at Fort Lauderdale, and the history and background of the service are unknown. It is higher on the chain of command than the Federal Bureau of Investigations, and normally arranges and handles the investigation and reintegration of burned operatives into the general population as private citizens, ensuring, by whatever means necessary (including blackmail and other methods designed to make burned operatives lives' difficult) to make them settle down and no longer make problems for the Intelligence Community. Apart from this, they hold the dossiers on burned operatives, kept confidential and classified, and also have the authority to (maybe) get a burned operative removed off the Black List and revoke their Burn Notice, but only after a departmental review of the operatives' status and a proper recommendation.
The Central Security Service (CSS) is an agency of the United States Department of Defense, established in 1972 by a Presidential Directive to promote full partnership between the National Security Agency (NSA) and the Service Cryptologic Elements (SCE) of the United States Armed Forces in the field of signals intelligence, cryptology and information assurance.