郵務員的主要職責包括： (a)執行郵局櫃位職務，保管現金及可轉讓庫存品； (b)分揀各類郵件，並記錄郵件的收發送遞； (c)負責郵件處理工作，包括包裹及特快專遞郵件； (d)會計、財務、核數、文書及統計工作；以及 (e)執行郵務督察的工作及／或承擔監督員工等職責。 有需要時，郵務員須輪班及／或超時工作，又或須穿着制服。

Main Duties of Postal Officer Include: (a)manning post office counters and the safe custody of cash and negotiable stock; (b)sorting mail of all categories and completing documentation relating to the receipt, movement, delivery and dispatch of mail; (c)mail processing duties including handling of parcels and Speedpost items; (d)accounting, financial, auditing, clerical and statistical duties; and (e)performing postal inspectorate and/or staff supervision duties, etc. He/she is required to work shifts and/or overtime as necessary; and may be required to wear uniform.