文書助理主要執行與下列一項或多項職能範圍有關的一般文書職責，其中可能涉及多個範疇職務： (a)一般辦公室支援服務； (b)人事； (c)財務及會計； (d)顧客服務； (e)發牌及註冊； (f)統計職務； (g)資訊科技支援服務；以及 (h)其他部門支援服務。 文書助理會被派往本港各區的政府辦事處工作；執行職務時須應用資訊科技；或須不定時或輪班工作，以及穿著制服當值。

A Clerical Assistant is mainly deployed on general and basic clerical duties which may involve multi-tasks relating to one or a combination of the following functional areas - (a) general office support; (b) personnel; (c) finance and accounts; (d) customer service; (e) licensing and registration; (f) statistical duties; (g) information technology support; and (h) other departmental support. A Clerical Assistant is subject to posting to any government offices in any district of Hong Kong; required to use information technology applications in the discharge of duties; and may be required to work irregular hours or shifts and wear uniform at work.