丈量員主要在地政總署測繪處工作，其主要職責包括 (a) 協助測量主任及／或土地測量師職系人員進行實地測量工作； (b) 利用小型測量設備／工具執行實地測量工作； (c) 就實地測量工作負責預備、看管、保養、維修、運送及保護測量設備、工具和物料； (d) 保持擺放測量器材的儲存間整齊清潔；以及 (e) 協助訓練二級工人。 (註： 丈量員或須(i)不定時工作；(ii)在交通繁忙、崎嶇起伏的地區和惡劣的天氣情況下擔任戶外工作；以及(iii)或調任到地政總署地政處工作。)

A Chainman normally works in the Survey and Mapping Office of Lands Department and is mainly deployed on (a) assisting members of Survey Officer and/or Land Surveyor grades in carrying out surveying work in the field; (b) using of minor survey equipment/tools for execution of surveying tasks in the field; (c) undertaking the preparation, care, repair and maintenance, transportation and safeguard of survey equipment, tools and materials for field survey operations; (d) maintaining the order and cleanliness of survey stores; and (e) assisting in the training of Workmen II. (Note : A Chainman may be required to (i) work irregular hours; (ii) work outdoors in heavy traffic, hilly or rugged areas and in inclement weather conditions; and (iii) may be posted to the Lands Administration Office of Lands Department.)