Who is the First Sergeant of the unit?

The First Sergeant of the unit is the senior non-commissioned officer responsible for the training, discipline, and welfare of the soldiers within the company. The correct answer identifies 1SG Brinkmeyer as the First Sergeant, which aligns with the typical rank and role associated with this position. In a military hierarchy, the First Sergeant is an E-8 and serves directly under the company commander, providing leadership and support to the enlisted soldiers.

In contrast, Command Sergeant Major Girdner holds a higher rank and is likely responsible for broader leadership issues at a higher echelon, while CPT Mokhtari, a Captain, would be the company commander overseeing operations rather than directly managing enlisted personnel. LTC Muirhead, as a Lieutenant Colonel, would be in charge of a battalion or larger unit, thus not fulfilling the specific duties of a First Sergeant. This hierarchy clarifies that the responsibility of First Sergeant is specifically aligned with the role held by 1SG Brinkmeyer.