Is the SSBI the personnel security investigation standard for the initial issuance of the Secret clearance for military positions?

The correct understanding related to the question is that an SSBI, or Single Scope Background Investigation, is not the standard for the initial issuance of a Secret clearance specifically for military positions. Instead, the standard personnel security investigation for issuing a Secret clearance for military personnel typically involves the National Agency Check with Local Agency and Credit Checks (NACLC) or another type of investigation that aligns with military protocols.

The SSBI is generally used for higher security clearance levels, such as Top Secret, rather than Secret status. Consequently, military positions usually do not require an SSBI for the issuance of a Secret clearance, which is why the assertion in the question is not accurate. This distinction is crucial for understanding the personnel security investigations associated with different clearance levels across military and civilian roles.