Which rank corresponds to the E-7 level in the Marine Corps?

The rank that corresponds to the E-7 level in the Marine Corps is Gunnery Sergeant. At this level, a Gunnery Sergeant typically has a significant amount of experience and responsibilities, often serving as a technical expert in their field. This rank involves leadership roles where they mentor junior Marines and may also play a critical part in training and operations. The E-7 level is recognized for having vital supervisory duties, which is a hallmark of the Gunnery Sergeant's position.

In contrast, the other ranks listed (Master Sergeant, Sergeant Major, and First Sergeant) correspond to either E-8 or E-9 levels. These ranks are typically associated with even higher levels of responsibility and leadership, focusing on broader management capabilities within the unit. Each of these ranks contributes significantly to the Marine Corps, but they operate at a different echelon than that of a Gunnery Sergeant, who embodies the E-7 level.