The proper form of address is "Sir" or "Major" or "Major Smith."
the Sergeant Major of the Marine Corps is Mike Barrett
There was no such thing as the Sergeant Major of the Marine Corps until 1957. The first Sergeant Major in the Marine Corps was Sergeant Major Archibald Sommers who became the Corps' first Sergeant Major in 1801.
Enlisted - Sergeant Major of the Marine Corps . Officer - Commandant of the Marine Corps .
the lesser known E9 rank is Sergeant Major of the Marine Corps.
Commandant of the Marine Corps Headquarters, U.S. Marine Corps, 3280 Russell Road, MCB Quantico, VA 22134-5009
No, there has not.
The highest ranking officer of the US Marine Corps is Commandant of the Marine Corps Paygrade O-10.
If you're asking what the name of that pay grade is, there are only two and they are Sargent Major (there's also the SgtMaj of the Marine Corps, but there's only one of them) and Master Gunnery Sargent.
The United States Marine Corps has never lost a major battle in its history.
In the United States Marine Corps, the rarest E9 rank is Master Gunnery Sergeant (E9). This rank is the highest enlisted rank in the Marine Corps and is only achieved by a small percentage of enlisted Marines who have demonstrated exceptional leadership, expertise, and experience in their military career. Master Gunnery Sergeants typically serve in specialized roles and are considered subject matter experts in their field.
Sergeant Major is E9 which is the highest NCO "pay grade" in the marines. Command Sergeant Major is E9 as well but has more seniority than just a Sergeant Major. Sergeant Major of the Marine Corps is also E9 but has the most seniority of any NCO in the marines. E9 means that you are enlisted and you are rank 9. E9 is used to represent the pay grade.
A member of the Marine Corps Reserves.