What is the title of an E-8 rank that also serves as the senior non-commissioned officer in a company?

The title of First Sergeant is specifically associated with the E-8 rank that serves as the senior non-commissioned officer in a company. This position is crucial in ensuring the well-being, training, discipline, and readiness of the soldiers within the company. The First Sergeant acts as a key advisor to the company commander and plays a significant role in implementing policies and maintaining standards across the unit.

While Master Sergeant and Sergeant Major are also E-8 ranks, their roles differ. A Master Sergeant typically focuses on technical expertise and has no command authority, while a Sergeant Major usually serves at higher levels of command and provides oversight for multiple units. Sergeant First Class, an E-7 rank, is primarily a direct leader of soldiers and does not hold the senior non-commissioned officer responsibilities characteristic of the First Sergeant role.