丈量員主要負責以下工作(a)協助測量主任及土地測量師職系人員進行實地測量工作；(b)獨立進行簡單實地測量工作；(c) 備妥、保管、保養和運送測量儀器、工具和物品，以便進行實地測量；以及(d) 確保測量設備儲存室整潔。

（註：獲取錄的申請人可能須(i)不定時工作; (ii)在建築工地、植物密茂斜坡、交通繁忙地點、高空、多山及偏遠地區;(iii) 在測量船上;以及(iv)於惡劣天氣及海有大浪情況下工作。）

A Chainman is mainly deployed on (a) assisting members of the Survey Officer and the Land Surveyor grades to carry out surveying work in the field; (b) carrying out simple surveying work independently in the field; (c) undertaking the preparation, care, maintenance and transportation of survey equipment, tools and materials for field survey operations; and (d) maintaining the order and cleanliness of the survey stores.

(Note: Successful candidates appointed may be required to work (i) irregular hours; (ii) in any part of the territory including construction sites, densely vegetated slopes, places with heavy traffic, at height, or hilly or rugged areas; (iii) on survey vessels; and (iv) in inclement weather and rough sea conditions.)