What rank does an officer hold at the pay grade of O-6 in the Marine Corps?

In the United States Marine Corps, an officer at the pay grade of O-6 holds the rank of Colonel. This rank is a senior leadership position, typically responsible for commanding a regiment or large task force and overseeing significant operational responsibilities within the Marine Corps.

The rank structure of the Marine Corps has a clear progression, with Colonel being above Lieutenant Colonel (O-5) and below Brigadier General (O-7). While Captain (O-3) is an earlier rank in an officer’s career, it is not near O-6, emphasizing the distinct levels of authority and responsibility associated with these ranks. Understanding the hierarchy of military ranks is essential for recognizing the command structure and the roles that officers play in military operations.