(a) 與土木工程有關的運作、維修及保養工作；(b) 與機械工程有關的安裝、運作及保養工作；(c) 與電機工程有關的安裝、運作及保養工作；(d) 與儀器或電子工程有關的安裝、運作及保養工作；(e) 濾水廠的運作、維修及保養工作；(f) 水務化驗室的後勤支援，包括處理和運輸化學品、設備、測試樣本、物料和文具； (g) 一般辦公室支援服務；(h) 執行雜務工作，例如派遞大型物品、搬運辦公室傢具及設備或一般物料；(i) 巡查及監察辦公室及洗手間的水、電設備的運作，並協助處理簡單維修工程及其善後工作；以及 (j) 負責所屬辦公室的保安及清潔工作，並協助監督合約清潔員工；負責內部及外部文件的收集及分發，並協助郵寄信件及清理文件盤的文件；影印、分類及釘裝文件。

(註：有關職位須執行大量體力勞動工作。二級工人或須執行隨時候召/上班候命/緊急職務；不定時工作、在正常工作時間以外工作，及/或輪班工作；以及在偏遠地方、惡劣環境、欠佳環境、水塘及/或戶外工作。）

(a) operation, repair and maintenance work related to civil engineering;(b) installation, operation and maintenance work related to mechanical engineering; (c) installation, operation and maintenance work related to electrical engineering; (d) installation, operation and maintenance work related to instrumentation or electronic engineering; (e) operation, repair and maintenance of water treatment works; (f) logistics support in waterworks laboratory including handling and transportation of chemicals, equipment, test samples, stores and stationery items; (g) general office support duties; (h) general labour duties such as delivering bulky despatches, moving office furniture/equipment or general stores; (i) monitoring and conducting routine checks on the operation of water and electricity facilities in the offices and toilets, assisting in carrying out simple repair works and taking follow-up action; and (j) being responsible for the office's security and cleansing matters, assisting in supervising contract cleansing workers; collecting and delivering documents indoor and outdoor, assisting in postal service and clearing file trays; photocopying, sorting and binding documents.

(Note : The post requires performing substantial amount of manual work. A Workman II may be required to undertake on-call/stand-by/emergency duties, work irregular hours, outside normal working hours, and/or shifts and work in remote areas, obnoxious conditions, unfavourable conditions, at reservoirs and/or carry out outdoor work.)