A Job Zone is a group of occupations that are similar in: how much education people need to do the work, how much related experience people need to do the work, and how much on-the-job training people need to do the work. The five Job Zones are: Job Zone 1 – occupations that need little or no preparation Job Zone 2 – occupations that need some preparation Job Zone 3 – occupations that need medium preparation Job Zone 4 – occupations that need considerable preparation Job Zone 5 – occupations that need extensive preparation. — source: O*NET Online Help