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Security clearances can be issued by many United States of America government agencies, including the Department of Defense (DoD), the Department of State (DOS), the Department of Homeland Security (DHS), the Department of Energy (DoE), the Department of Justice (DoJ), the National Security Agency (NSA), and the Central Intelligence Agency (CIA).
Because the same investigation is used to grant Top Secret security clearances, the two are often written together as TS//SCI. Eligibility alone does not confer access to any specific SCI material; it is simply a qualification. One must receive explicit permission to access an SCI control system or compartment.
For this reason, security clearances are required for a wide range of jobs, from senior management to janitorial. According to a 2013 Washington Post article, over 3.6 million Americans had top-secret clearances; almost one-third of them worked for private companies, rather than for the U.S. government. [32] [33]
The United States has three levels of classification: Confidential, Secret, and Top Secret. Each level of classification indicates an increasing degree of sensitivity. Thus, if one holds a Top Secret security clearance, one is allowed to handle information up to the level of Top Secret, including Secret and Confidential information. If one ...
Top Secret is the highest level of classified information. [4] Information is further compartmented so that specific access using a code word after top secret is a legal way to hide collective and important information. [5] Such material would cause "exceptionally grave damage" to national security if made publicly available. [6] Prior to 1942 ...
However including those as specific types of clearances (TS/SI, TS/SCI/S) would simply lead to an infinite (well a lot of) permutations that might or might not be repeatable.--msnyc15. These are not clearances. They are only the bases for granting access. There is only one Top Secret clearance: Top Secret. SCI is an access.
A United States security clearance is an official determination that an individual may access information classified by the United States Government. Security clearances are hierarchical; each level grants the holder access to information in that level and the levels below it.
A Q Clearance is equivalent to a U.S. Department of Defense Top Secret clearance. [2] According to the Department of Energy, "Q access authorization corresponds to the background investigation and administrative determination similar to what is completed by other agencies for a Top Secret National Security Information access clearance." [2]