Which identifier is used to document a Soldier's specialized skills closely related to their MOS?

The Additional Skill Identifier (ASI) is the correct choice for documenting a Soldier's specialized skills that are closely related to their Military Occupational Specialty (MOS). ASIs are used to indicate skills that enhance a Soldier's capabilities within their primary job function and provide additional qualifications that can be crucial for particular assignments or roles.

For example, if a Soldier in a technical MOS acquires skills in a specific software program that is relevant to their duties, this would be documented with an ASI. This notation helps commanders identify personnel who possess the necessary skills for unique tasks and facilitates better resource management and assignment decisions within the force structure.

Other identifiers, like Special Qualification Identifiers (SQIs), typically denote specific qualifications that are outside of a Soldier's MOS, and Language Identifier Codes are focused solely on documenting language proficiency. Duty Identifiers refer to specific duties a Soldier may perform but do not capture the additional qualifications tied directly to their main skill set. Thus, ASIs serve a more focused purpose in enhancing and documenting complementary skills.