Mark E. Ferguson III (born October 30, 1956) is a United States Navy four-star admiral who currently serves as the 37th Vice Chief of Naval Operations. He previously served as the 55th Chief of Naval Personnel (CNP) and concurrently served as the Deputy Chief of Naval Operations (Manpower, Personnel, Training & Education). Prior to that, he served as Chief of Legislative Affairs and Assistant Commander for Distribution, Navy Personnel Command. He assumed his current assignment on August 22, 2011.