Eight on supplemental promotion list Published Aug. 14, 2012 By Senior Airman Heather Heiney 81st Training Wing Public Affairs KEESLER AIR FORCE BASE, Miss. -- Eight Keesler enlisted members are on the supplemental promotion list released Aug. 9. Being promoted to staff sergeant are: Neil Barrett, 85th Engineering Installation Squadron. Cory Martin, 85th EIS. Brian Phan, 81st Diagnostics and Therapeutics Squadron. Matthew Wagner, 81st Logistics Readiness Squadron. Nathan Williams, 85th Engineering Installation Squadron. Being promoted to technical sergeant are: Matthew McBride, 333rd Training Squadron. Michael Trotter, 345th Airlift Squadron. Robert Walker, 81st Training Support Squadron.