senior master sergeant 
noun
A rank of non-commissioned officer in the US air force, above master sergeant and below chief master sergeant.My selection allowed for many growth opportunities and contributed to my future success and first-time up selections for senior master sergeant and chief master sergeant....
- When the Air Force made both of them senior master sergeants, the race became an official event.
- So, we have programs that are being run by technical sergeants that are frequently administered at a main operating base by senior master sergeants.