二級工程化驗室技術員主要負責-
(a) 負責樣本預備／收集及污水、污泥及工商業污水樣本例行測試／分析的工作；
(b) 進行實地水流量度及協助實地污水取樣及化驗;
(c) 保存及修訂分析結果紀錄及協助準備個案研究報告;
(d) 協助購買和補充化學劑、化驗室儀器和設備並紀錄存貨;以及
(e) 協助督導和培訓初級人員。

(二級工程化驗室技術員或須在實地或户外工作；輪班當值及／或不定時工作。)

An Engineering Laboratory Technician II is mainly deployed on –
(a) preparing/collecting samples and conducting laboratory tests/analyses on sewage, sludge and trade effluent samples;
(b) performing flow gauging duties on site and assisting in field sampling and testing of effluent;
(c) maintaining and updating records of analytical results and assisting in preparing case study reports;
(d) assisting in inventory keeping, purchasing and replenishment of chemicals, laboratory apparatus and equipment; and
(e) assisting in the supervision and training of junior staff.

(An Engineering Laboratory Technician II may be required to work on site or outdoors, work shifts and/or irregular hours.)