He seems to be doing more work than his title "Character Model Designer" should entail. I guess he could be checking that his model works in every circumstance but that would still normally be QA to report on for him to later fix.
Then there were the other changes he was making which he probably shouldn't even have access to.
Weird approach to portraying his role in this games development.
EDIT: Well, in the very next chapter it shows his employee card again and it says he's QA, so now it makes more sense.