What Is the Highest Level of Security Clearance in the U.S.?

Learn about the highest U.S. security clearance level, Top Secret/Sensitive Compartmented Information (TS/SCI), and its requirements.

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The highest level of clearance in the United States is Top Secret/Sensitive Compartmented Information (TS/SCI). This level protects the nation's most sensitive information that, if disclosed, could cause exceptionally grave damage to national security. Access to TS/SCI requires not just a Top Secret clearance, but also a need-to-know and access to specific intelligence compartments, determined by an SCI adjudication process.

FAQs & Answers

  1. What does TS/SCI stand for? TS/SCI stands for Top Secret/Sensitive Compartmented Information, the highest security clearance level in the U.S. used to protect highly sensitive information.
  2. What is required to obtain a TS/SCI clearance? Obtaining TS/SCI clearance requires having a Top Secret clearance, a demonstrated need-to-know, and approval through a Sensitive Compartmented Information adjudication process.
  3. How many levels of security clearance are there in the U.S.? The primary levels of security clearance in the U.S. are Confidential, Secret, and Top Secret, with TS/SCI representing a special category within Top Secret for compartmentalized information.

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