List of U.S. security clearance terms explained

This list covers security clearance terms used in the United States of America.

Within the U.S. government, security clearance levels serve as a mechanism to ascertain which individuals are authorized to access sensitive or classified information. These levels often appear in employment postings for Defense related jobs and other jobs involving substantial amounts of responsibility, such as air traffic control or nuclear energy positions.

The different organizations in the United States Federal Government use different terminology and lettering. Security clearances can be issued by many United States of America government agencies.

The checks for clearances and the granting of clearances is carried out by the US Office of Personnel Management.[1] [2]

Use

Security clearance levels often appear in employment postings for Defense related jobs, and other jobs involving substantial amounts of responsibility, such as air traffic control or nuclear energy positions. Employers generally prefer to hire people who are already cleared to access classified information at the level needed for a given job or contract, because security clearances can take up to a year to obtain. 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).

Security levels

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). DoD issues more than 80% of all clearances. There are three levels of DoD security clearances:[3]

  1. TOP SECRET – Information of which the unauthorized disclosure could reasonably be expected to cause exceptionally grave damage to the national security.
  2. SECRET – Information of which the unauthorized disclosure could reasonably be expected to cause serious damage to the national security.
  3. CONFIDENTIAL – Information of which the unauthorized disclosure could reasonably be expected to cause damage to the national security.
  4. Unacknowledged Special Access Program (USAP): USAP & "Waived USAP" – Made known only to authorized persons, including members of the appropriate committees of the US Congress. Waived USAP is a subset of USAP.
  5. Alternative or Compensatory Control Measures (ACCM) – Security measures used to safeguard classified intelligence or operations and support information when normal measures are insufficient to achieve strict need-to-know controls and where SAP controls are not required.[4] [5] [6] [7] [8]

Additionally, the United States Department of Energy issues two levels of security clearances:

  1. Q Clearance – Allows access to Classified information up to and including TOP SECRET data with the special designation: Restricted Data (TS//RD) and special Q-Cleared "security" areas.
  2. L Clearance – Allows access to Classified information up to and including SECRET data with the special designation: Formerly Restricted Data (S//FRD) and special L-Cleared "limited" areas.

Additional Security descriptions and designations

Public trust position

Despite the common misconception, a public trust position is not a security clearance, and is not the same as the confidential designation. Certain positions which require access to sensitive information, but not information which is classified, must obtain this designation through a background check. Public Trust Positions can either be moderate-risk or high-risk.[9] [10]

Classification subsets: Sensitive Compartmented Information and Special Access Programs

Information "above Top Secret," a phrase used by the media, means either Sensitive Compartmented Information (SCI) or Special Access Program (SAP). It is not truly "above" Top Secret, since there is no clearance higher than Top Secret. SCI information may be either Secret or Top Secret, but in either case it has additional controls on dissemination beyond those associated with the classification level alone. In order to gain SCI Access, one would need to have a Single Scope Background Investigation (SSBI). Compartments of information are identified by code words. This is one means by which the "need to know" principle is formally and automatically enforced.

In order to have access to material in a particular SCI "compartment", the person must first have the clearance level for the material. The SCI designation is an add-on, not a special clearance level. Someone cleared at the SECRET level for some compartment X cannot see material in compartment X that is classified TOP SECRET. But the opposite is true: a person cleared for TOP SECRET with access to X material can also access SECRET material in compartment X. Compartments have designators which uniquely identify that compartment. These designators may also be classified, even protected under another SCI compartment.

As long as the holder of a clearance is sponsored, the clearance remains active. If the holder loses sponsorship, the holder is eligible for re-employment with the same clearance for up to 24 months without reinvestigation, after which an update investigation is required.

A Periodic Reinvestigation is typically required every five years for Top Secret and ten years for Secret/Confidential, depending upon the agency. Access to a compartment of information lasts only as long as the person's need to have access to a given category of information.

Additional Designations

Unclassified (U) is a valid security description, especially when indicating unclassified information within a document classified at a higher level. For example, the title of a Secret report is often unclassified, and must be marked as such. Material that is classified as Unclassified // For Official Use Only (U//FOUO) is considered between Unclassified and Confidential and may deal with employee data.

For access to information at a given classification level, individuals must have been granted access by the sponsoring government organization at that or a higher classification level, and have a need to know the information. The government also supports access to SCI and SAPs in which access is determined by need-to-know. These accesses require increased investigative requirements before access is granted.[11]

Investigations

The following investigations are used in clearance determinations:[12]

Many other investigative products have been used to grant clearances in the past. While some of them are still used to determine suitability for employment or enlistment, only the above are used to grant clearances.

Additional investigation or adjudication

Certain accesses require persons to undertake one or more polygraph tests:

SCI eligibility

Sensitive compartmented information (SCI) is a type of classified information controlled through formal systems established by the Director of National Intelligence. To access SCI, one must first have a favorable SSBI and be granted SCI eligibility. Because the SSBI is also used to grant collateral top secret eligibility, the two are often granted together and referred to as TS/SCI. Access to individual SCI control systems, compartments, and subcompartments may then be granted by the owner of that information. Note that additional investigation or adjudication may be required.

In general, military personnel and civilian employees (government and contractor) do not publish the individual compartments for which they are cleared. While this information is not classified, specific compartment listings may reveal sensitive information when correlated with an individual's résumé. Therefore, it is sufficient to declare that a candidate possesses a TS/SCI clearance with a polygraph.

References

  1. Web site: Investigations FAQs . 9 February 2023 . US Office of Personnel Management . "Security clearances are granted on a need-to-have basis when a person's position requires access to classified information.".
  2. Web site: 9 February 2023 . Security Clearances . 9 February 2023 . Northrop Grumman.
  3. Web site: Security Clearance FAQ. live. https://web.archive.org/web/20040329210014/https://www.clearancejobs.com/security_clearance_faq.pdf. 29 March 2004. 30 October 2021. www.clearancejobs.com.
  4. Web site: DCMA Manual 3301-08: Information Security . Defense Contract Management Agency . Department of Defense.
  5. Web site: Department of Defense Manual . 2013.
    • Web site: 28 November 2001. Handling Classified Information. live. https://web.archive.org/web/20100527222356/https://www.wrc.noaa.gov/wrso/security_guide/handling.htm. 27 May 2010. 30 October 2021. www.wrc.noaa.gov.
    • Web site: 28 November 2001. Classification & Distribution Controls. live. https://web.archive.org/web/20100527222225/https://www.wrc.noaa.gov/wrso/security_guide/classif.htm. 27 May 2010. 30 October 2021. www.wrc.noaa.gov.
  6. Web site: PART 117 - National Industrial Security Program Operating Manual. 30 October 2021. www.ecfr.gov.
  7. Web site: 30 November 2010. National Security Positions vs. Public Trust Positions. 30 October 2021. www.dm.usda.gov.
  8. Web site: FEDERAL SECURITY/SUITABILITY CLEARANCE CHART. 30 October 2021. fedcas.com.
  9. https://www.cdse.edu/Portals/124/Documents/student-guides/SA001-guide.pdf
  10. Web site: 24 August 2010. Aligning OPM Investigative Levels With Reform Concepts. 30 October 2021. archive.opm.gov.
    DOE M 470.4-5 pp. II-4--II-5

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