What is the title of the highest rank within the E-9 pay grade?

The title of the highest rank within the E-9 pay grade is the Sergeant Major of the Army. This position is uniquely significant within the U.S. Army as it serves not only as the highest enlisted rank but also as the senior enlisted advisor to the Chief of Staff of the Army. The role encompasses representing the enlisted force, providing counsel on matters affecting enlisted soldiers, and addressing their concerns at the strategic level.

In contrast, while Sergeant Major and Command Sergeant Major are important ranks within the E-9 pay grade, they do not hold the same seniority or specific representation responsibilities as the Sergeant Major of the Army. Master Sergeant, although it is also an E-9 rank, is considered a lower tier within the E-9 pay grade hierarchy and does not carry the same overarching leadership and representation duties associated with the Sergeant Major of the Army.