Wounded, ill and injured Marines with the U.S. Marine Corps Wounded Warrior Regiment look on as Sgt. Maj. John Ploskonka stands at attention in front of Col. John Mayer, Wounded Warrior Regiment commanding officer and Sgt. Maj. Joseph E. VanFonda during a post and appointment ceremony Jan. 23, at the National Museum of the Marine Corps here. During the ceremony Sgt. Maj. Ploskonka passed his duties as regimental sergeant major of the Wounded Warrior Regiment to Sgt. Maj. VanFonda. Ploskonka was selected to serve as the sergeant major of the Marine Corps Installations Command, Arlington, Va. - Wounded, ill and injured Marines with the U.S. Marine Corps Wounded Warrior Regiment look on as Sgt. Maj. John Ploskonka stands at attention in front of Col. John Mayer, Wounded Warrior Regiment commanding officer and Sgt. Maj. Joseph E. VanFonda during a post and appointment ceremony Jan. 23, at the National Museum of the Marine Corps here. During the ceremony Sgt. Maj. Ploskonka passed his duties as regimental sergeant major of the Wounded Warrior Regiment to Sgt. Maj. VanFonda. Ploskonka was selected to serve as the sergeant major of the Marine Corps Installations Command, Arlington, Va.