Looks like he has 6 stripes on his upper foreleg, guess that makes him a MSGT.
When I was in the USAF they used goats in the POL area to keep the grass trimmed in the tank farm where the jet fuel was stored. Maybe they still do.
There was a warehouse cat at Tachikawa AFB Japan in 1958 known as “Master Sgt Sam Spitnik”, a big mean tabbie like this one.
(Sputnik was launched the year before, hence the name)
The tradition continues.