Sgt. Maj. Avery L. Crespin currently serves as the Headquarters Battalion Sergeant Major, having assumed the responsibility in December 2015. Throughout his career, Crespin has enjoyed being stationed in places like Islamabad, Pakistan, and Caracas, Venezuela. (Official Marine Corps photo by Cpl. Medina Ayala-Lo/Released) - Sgt. Maj. Avery L. Crespin currently serves as the Headquarters Battalion Sergeant Major, having assumed the responsibility in December 2015. Throughout his career, Crespin has enjoyed being stationed in places like Islamabad, Pakistan, and Caracas, Venezuela. (Official Marine Corps photo by Cpl. Medina Ayala-Lo/Released)