I cannot recall a post where Q claimed to personally have Q Clearance. Nor can I recall him stating that he was MI or NSA either. There have been a few statements implying those things, but none were concrete admissions. Posting photos of MI Generals surrounding Trump, or photos of AF1 does not mean he is one of them or that he has ever even met POTUS.
Besides, if Q is a LARP what difference would it make because the crumbs dropped have led to some really great research.