Is diet therapy apprentice in demand in the air force’?

hi i was wondering if diet therapy apprentice are needed in air force bases… i wanna take this job because im a culinarian and i could use the experience after the service… my recruiter told me that they rarely get diet therapists and rather get civilians as diet therapists? is this true? and i was wondering how long would i have to wait after meps if i realy want the job…
well its in the general section… maybe ill just join the army or the marines.. i dont mind getting dirty… but i just want experience because i wanna be in the culinary industry someday… i wanna make the six years worth it..

Maybe in the air force

but the Marine Corps has this little thing called PT time

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