Sgt. Maj. Ronald L. Green has been named by Commandant Gen. Joseph Amos to serve as the 18th sergeant major of the Marine Corps. Green, now the sergeant major of I Marine Expeditionary Force (I MEF), will succeed outgoing Sgt. Maj. Micheal P. Barrett during a Feb. 20 ceremony at the Marine Corps War Memorial in Arlington, Va. Like his predecessors, Green will serve as the senior enlisted advisor to the commandant.