To establish or maintain a TS-SCI, which type of background investigation is required?

To establish or maintain a TS-SCI, which type of background investigation is required?

• A. SSBI or SSBI-PR
• B. NACLC
• C. NACI
• D. CBI

Answer: (A)

The key idea here is that a Top Secret/Sensitive Compartmented Information (TS-SCI) clearance requires an in-depth, full-scope background check. This is done through a Single Scope Background Investigation, which delves into nearly all aspects of a person’s history—personal, professional, financial, criminal, and foreign contacts—often with interviews of the applicant, coworkers, and references. If you’re maintaining the TS-SCI clearance over time, this in-depth review can be conducted as a periodic reinvestigation (the SSBI-PR variant), ensuring continued eligibility at the highest level. Other types of checks are not sufficient for TS-SCI. NACLC is a lighter, agency-check-based review used for lower levels of clearance, NACI is geared toward public trust determinations rather than security clearances, and CBI refers to a counterintelligence check that isn’t the standard process for granting or renewing TS-SCI access.

The key idea here is that a Top Secret/Sensitive Compartmented Information (TS-SCI) clearance requires an in-depth, full-scope background check. This is done through a Single Scope Background Investigation, which delves into nearly all aspects of a person’s history—personal, professional, financial, criminal, and foreign contacts—often with interviews of the applicant, coworkers, and references. If you’re maintaining the TS-SCI clearance over time, this in-depth review can be conducted as a periodic reinvestigation (the SSBI-PR variant), ensuring continued eligibility at the highest level.

Other types of checks are not sufficient for TS-SCI. NACLC is a lighter, agency-check-based review used for lower levels of clearance, NACI is geared toward public trust determinations rather than security clearances, and CBI refers to a counterintelligence check that isn’t the standard process for granting or renewing TS-SCI access.