Player Embed Code: <iframe width='500' height='300' scrolling='no' frameborder='0' style='border: none; overflow: hidden; width: 500px; height: 300px;' allowtransparency='true' src='https://www.dvidshub.net/video/embed/902560'></iframe> Download Embed Share The First Marine to Wear the Rank Insignia of SEAC Defense Media Activity - Marines Nov. 2, 2023 | 1:03 Sgt. Maj. Troy E. Black: The second Marine Senior Enlisted Advisor to the Chairman and the FIRST to proudly wear the SEAC rank insignia created on January 31, 2020. (U.S. Marine Corps graphic by Cpl. Brian A. Stippey)