Source: US Defense Joint Chiefs of Staff
Senior Enlisted Advisor to the Chairman (SEAC) U.S. Marine Corps Sgt. Maj. Troy E. Black delivered opening remarks to U.S., partner, and allied senior noncommissioned officers and petty officers during the KEYSTONE class’s visit to the Pentagon in Arlington, Virginia, June 3, 2025. KEYSTONE is the world’s premiere Enlisted Joint Professional Military Education course for service members selected to advise general and flag officers taught by the National Defense University.