Who is the Sergeant Major of the Marine Corps?

• A. Sergeant Major Carlos Ruiz
• B. General Eric Smith
• C. Admiral Christopher Grady
• D. Rear Admiral Gregory Huffman

Answer: (A)

The key idea is who holds the top enlisted leadership position in the Marine Corps. The Sergeant Major of the Marine Corps is the senior enlisted adviser to the Commandant, representing all enlisted Marines and focusing on matters like training, morale, discipline, and enlisted professional development.

The correct choice names the person who serves in that role: Sergeant Major Carlos Ruiz. Only a Sergeant Major holds this specific billet; generals and admirals are officers and would not occupy the senior enlisted post in the Marine Corps. The other names are an officer at the general rank and two officers from the Navy, which do not match the senior enlisted leadership position in the Marine Corps.