一級工人的主要職責為－
(a)車輛管理科：(i)清潔、清洗車輛和為車輛打蠟，過程中可能須操作簡單機器；以及(ii)執行一般的清潔及體力勞動工作。
(b)印務科：(i)管理出入稿件記錄和協助製版工作；(ii)操作數碼印刷器材以執行簡單的印刷工作；(iii)操作簡單的釘裝器材，以及執行簡單的手工類釘裝工作；(iv)將印刷品包裝、加上標貼、搬運、裝載和整理分類；(v)檢查印刷品有沒有出現任何問題，例如編碼次序或印刷品上的瑕疵、核數編號的表格和收據等；以及(vi)記錄裝卸區內的貨物調動和搬運貨物等。

如有需要，一級工人須接受部門內部或部門間的職位調派安排，以填補同一職系的職位空缺和擔任同一職系下不同種類的職務。一級工人須輪班工作、在有需要時逾時工作以及穿著制服。

A Workman I is mainly deployed on -
(a) Land Transport Division: (i) cleaning, washing and waxing of vehicles which may involve the use of simple machines; and (ii) undertaking general cleansing and labouring duties.
(b) Printing Division: (i) maintaining a proof registry and assisting in platemaking work; (ii) performing simple printing work using digital printing equipment; (iii) operating simple binding equipment and performing simple hand binding work; (iv) packing, labeling, moving, loading and sorting of printed matters; (v) checking accuracy of printed matters such as numbering sequence or print defects, audit number forms and receipts; and (vi) documenting the movement and maneuvering of goods in the Loading Bay.

In addition, Workmen I are subject to posting and transfer within the department or in other bureaux/departments to fill vacancies and carry out different duties in the same grade when the need arises. Workmen I are required to work shifts and, when necessary, perform overtime work and wear uniform.