Mail, postal and related workers process and sort mail and parcels in post offices, mail processing plants and internal mail rooms, and clerks who serve customers and record transactions at sales counters and postal wickets.

You need some high school. To be a mail and postal clerk or mail sorter, you may need a high school diploma and some college office administration courses. With experience / additional training, you may move up the ranks to become a supervisor or facility manager. Many recent entrants have a high school diploma, and almost 1 in 5 has a trade / vocational certificate or community college diploma.