Which of the following ranks is considered a senior enlisted member in the Army?

The rank of Sergeant Major is recognized as a senior enlisted member in the Army due to its position and responsibilities within the military hierarchy. A Sergeant Major typically serves in positions of significant authority, where they advise commanders on enlisted matters and assist in leadership at various levels. This rank indicates extensive experience, leadership capabilities, and a high level of expertise in military operations and personnel management.

In contrast, the other ranks listed, such as Staff Sergeant, Corporal, and Private First Class, are considered junior or mid-level ranks in the enlisted ranks of the Army. While each of these ranks plays essential roles in the military structure, none carry the same level of seniority or the vast scope of responsibilities associated with the rank of Sergeant Major.