Creation of opportunities by means of above average distribution skills and extensive experience in all aspects in a distribution type environment. my question is, is it, "of a" or "in an" or "in a" distribution type..

of an

I would say 'of a'. (Use 'an' rather than 'a' only before a vowel.)

Ooops, yes. That's right. It's "of a".

(Incidentally, an is used before a vowel sound as opposed to a vowel. So it's "an RTA".)