Seven-level

I asked how they were doing and they said they couldn't figure out the T.O. and were waiting for a seven level to explain it to them. I went back to my truck and told maintenance control we'd need a seven level radio man.

Source: wiktionary

Follow-on training would take place after completion of the basic apprentice or craftsman courses. Three-level students would attend ATHRS training, and select 7-level students (approximately 49 per year) would attend AFBDS training.

Source: wiktionary

The Civil Engineer (CE) Readiness Flight Officer and seven-level Craftsman courses provide flight leaders and mid-level NCOs with the background and the technical information that is necessary for effective management of the CE Readiness Flight and contingency response operations.

Source: wiktionary

While I was assigned to the parachute shop, although I was in charge and was the senior NCO in charge of two other SSgt's and seven airmen, I was still only a five level and could not be promoted to TSgt without making a seven level.

Source: wiktionary