We've found 3 phrases for preoccupied (0.1 seconds):

full of oneself »    Egotistical, believing oneself to be superior to others; preoccupied with one's own work, interests, point of view, etc.

have one's hands full »    To be busy or thoroughly preoccupied.

rivet counter »    A person who has an obsession with the minutae of their particular interest. Anyone preoccupied with small distinguishing features between different items.

BTW, Why won't you become an editor?