主要職責包括： (a)監督及管理就提升車輛廢氣模型的準確度進行研究的承辦商； (b)對本地車輛廢氣數據進行統計分析； (c)研發及改良車輛廢氣估算模型； (d)編製車輛廢氣排放清單； (e)就採用便攜式廢氣測量系統量度車輛廢氣提供協助； (f)協助建立本地車輛排放數據庫。 工作時間及地點須視乎部門的運作需要而定。獲聘人員可能要(a) 不定時及超時工作，包括晚上及周末和周日，及(b) 間中在戶外工作。

The main duties include : (a) overseeing and managing contractors for conducting studies to improve the accuracy of vehicle emission models; (b) conducting statistical analysis on local vehicle emission data; (c) developing and upgrading vehicle emission estimation models; (d) compiling vehicle emission inventories; (e) assisting in vehicle emission measurements using portable emission measurement systems; (f) assisting in building up a local vehicle emission database. The hours and venues of work may be varied having regarded to the operational needs of the department. The successful candidate may be required to (a) work irregular hours and overtime, including evenings and weekends; and (b) work occasionally outdoors.