丈量員主要負責以下工作(a) 協助測量主任或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；(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;以及(ii) 在建築工地、植物密茂斜坡、交通繁忙地點、多山及偏遠地區、測量船、高空、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 or the Land Surveyor grades to carry out survey 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 store. (Note: Successful candidates appointed may be required to (i) work irregular hours; and (ii) work in construction sites, densely vegetated slopes, heavy traffic, hilly and remote areas, onboard survey vessels, at height, under inclement weather and rough sea conditions.)