A professional who sorts and processes mail in post office. Responsibilities include:

• Sorts incoming or outgoing mail into mail rack pigeonholes or into mail sacks according to destination.
• May feed letters into electric canceling machine or hand-stamp mail with rubber stamp to cancel postage.
• May serve at public window or counter.
• May transport mail within post office (material handler).
• May sort mail in mobile post office and be designated Distribution Clerk, Railway Or Highway Post Office.
• May sort mail which other workers have been unable to sort and be designated Special-Distribution Clerk.