合約農林助理員主要負責在海岸公園內為遊客提供指示及協助；調解及協調海岸公園使用者之間的糾紛；在海岸公園內巡邏及在護理站內執行職務; 執行法例，包括警告、調查、檢控、出席審訊及保存和安排證物；進行公眾教育及宣傳工作；製作及保存有關執行法例、遊客服務、及海岸公園管理的記錄、報告及數據；進行野外研究和調查及在有需要時駕駛政府船隻及車輛；協助計劃和分配工作及有效地安排船隻、車輛及員工的戶外工作；分配適當的工具、物料及儀器予下屬以確保其被有效運用；及因應管理和保護海岸公園的需要而進行其他特別職務。 （註：須在新界工作，並可能須不定時工作（包括晚間及周末）、在基地以外的地方通宵工作，以及在部門或商業船上工作。）

A Contract Field Assistant is mainly deployed on offering advice and assistance to marine park visitors; liaising and resolving conflicts between various marine parks users; patrolling in marine parks and performing duties in warden posts; carrying out law enforcement duties, including warnings, investigations, prosecutions, attending court hearing and safe keeping and arranging the production of exhibits for evidence; carrying out public education and publicity work; preparing and keeping records, reports returns and data concerning law enforcement, visitor services and marine park management; making field investigation and inspections and driving government vessels and vehicles when necessary; assisting in the planning and allocation of work and the efficient deployment of vessels and vehicles and organization of staff for field operation; allocating proper tools, materials and equipment to his subordinates for efficient operational use; and, performing any other special duties and assignment in respect of management and protection of marine parks. (Note : Required to work in the New Territories and may have to work irregular hours including evenings and weekends, to stay overnight away from the base, and to spend time at sea on departmental or commercial vessels.)