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In general, most employers look for candidates who hold an active Department of Defense (DoD) collateral clearance or a blanket TS/SCI-cleared (Top Secret / Sensitive Compartmented Information) and who have a counterintelligence (CI), full-scope polygraph (FSP), also known as expanded scope screening (ESS).
All SCI must be handled within formal access control systems established by the Director of National Intelligence. [1] SCI is not a classification; SCI clearance has sometimes been called "above Top Secret", [2] but information at any classification level may exist within an SCI control system. When "decompartmentalized", this information is ...
Polygraph. Some agencies may require polygraph examinations. [40] The most common examinations are Counter Intelligence (CI) and Full-Scope (Lifestyle) polygraphs. While a positive SSBI is sufficient for access to SCI-level information, polygraphs are routinely administered for "staff-like" access to particular agencies. [citation needed]
A Single Scope Background Investigation (SSBI), now called a Tier 5 (T5) [1] investigation, is a type of United States security clearance investigation. [2] It involves investigators or agents interviewing past employers, coworkers and other individuals associated with the subject of the SSBI.
"Top Secret shall be applied to information, the unauthorized disclosure of which reasonably could be expected to cause 'exceptionally grave damage' to the National Security that the original classification authority is able to identify or describe." [27] As of 2019, around 1.25 million individuals have Top Secret clearance. [32]
After the United States entered into World War II, Britain changed its security classifications to match those of the U.S..Previously, classifications had included the top classification "Most Secret", but it soon became apparent that the United States did not fully understand the UK's classifications, and classified information appeared in the U.S.'s press.
The treatment of SCI is singular among SAPs, and it seems there is some disagreement within the government as to whether or not SCI is a SAP. Defense Department sources usually state that it is, [ 11 ] [ 12 ] and at least one publication refers to a separate SCI-SAP category alongside the three listed above. [ 13 ]
Top Secret is the highest level of classified information. [5] 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. [6] Such material would cause "exceptionally grave damage" to national security if made publicly available. [7]