園境師的主要職責是(a) 擬備園境總綱計劃﹑詳細圖則和綠化種植計劃，以善用房屋委員會轄下公屋發展項目的休憩用地，或為其他政府部門提供有關服務；(b)就公屋發展項目與園境工作有關的園境設計及行政管理事宜，提供意見﹔(c)就公屋發展項目的綠化﹑園境規劃及設計﹑園境管理及植被管理等事宜，提供專業支援及意見，以及向其他政府部門提供有關服務﹔(d)管理顧問﹑以及協調與公屋發展項目有關的園境工作﹔以及(e)監督輔助人員，包括技術人員﹑園藝工地人員和學位見習員。

A Landscape Architect is mainly deployed on (a) preparing landscape master plans, detailed plans, and planting plans to utilize open spaces in public housing developments under the Housing Authority, or for other government departments; (b) advising on landscape design and administrative control matters relating to landscape matters in public housing developments; (c) providing professional support and advice on matters relating to greening, landscape planning and design, landscape management and vegetation management in public housing developments, and other government departments; (d) managing consultants and co-ordinating works relating to landscape matters in public housing developments; and (e) supervising supporting staff including technical staff, horticultural site staff, and graduate trainees.