Marine Sergeant Major (Dragonstar)
This is generally the highest ranks entlisted personel can hope to aquire. A sergeant major is a highly respected petty officer, but still not an officer. It is very hard for sergants to be promoted to officers. However, most officers will listen to a Marine Sergeant Major and give their suggestions full consideration.
Sergeant Majors are responsible for the order within a marine regiment, and acts as the major representative of the enlisted men. In this capacity, a sergeant-major is always present during regimental staff meetings.
If there are more than a single Sergeant Major in a regiment, one is always in command while the others are usually specialists or otherwise somewhat outside the regular chain of command.