What is the correct way to construct the following sentence from a grammatical and punctuation perspective?
Example: Currently occupying the position of a server Moderator in the ''AVU'' group.
Should there be a comma after ''currently''? Are the prepositions ''of'' and ''in'' correct in this context? (It is from a resume.)
Given that the context is a resume:
Not necessary. Using one or not here doesn't do much to change the meaning, especially since we're not using a complete sentence.
Yes. "In" is a correct preposition to denote inclusion in a group. "Of" is a correct preposition when naming a position. However, "Currently occupying the position of..." can be reworded to be more concise.
Given that the phrase is from a resume, some options:
(I agree with Otomatonium's answer; just wanted to add some background information.)
Strictly speaking, the "example" given is not a sentence (it has no subject). However, since the comments above indicate that the context is a resume, I'll answer on that basis.
It is normal in a resume to list a number of bullet points which would all form complete sentences when prefixed by a short phrase, including the subject and possibly a verb. This phrase is easily deduced from the context.
In your case, the omitted understood phrase might be "Boris is...". All the other bullet points listed with this one should form complete sentences if the same phrase were supplied before them.
This type of outline structure, where each point supplies part of a complete sentence (of which the other part is the same for all points), is certainly not the only valid way to write a resume. It is one effective mechanism for maintaining parallel form.
