Which of the following ranks is associated with E-9 in the Marine Corps?

The rank associated with E-9 in the Marine Corps is Master Gunnery Sergeant. This is a significant rank within the enlisted ranks, denoting a high level of experience and expertise in a specific field. The Master Gunnery Sergeant serves not only as a leader but also as a principal advisor and technical authority within their area of specialization.

In the Marine Corps, the E-9 rank level includes two distinct titles: Master Gunnery Sergeant and Sergeant Major. However, when considering the specific title associated most directly with E-9 in the context of technical proficiency and non-commissioned officer roles, Master Gunnery Sergeant is the appropriate answer.

Other ranks mentioned are at different enlisted levels; Sergeant is an E-5, Gunnery Sergeant is an E-7, and Private First Class is an E-2. Understanding the hierarchy of ranks is crucial in recognizing the responsibilities and roles associated with each level of leadership within the Marine Corps.