The growing body of literature addresses the role of state and non-state actors in the programme for reducing climate change risk. Unfortunately, the research studies collaboration among the stakeholders is extremely scarce. This paper contributes to the recent debates by seeking the collaboration between local government and civil societies in taking part in the issue of reducing climate change effect. By looking in-depth at the green Siak programme in Indonesia, we portray the actors, activities, and programme collaborated and conducted along with government and non-government organizations. This research applied a qualitative approach. The data were collected using interviews and secondary sources. The results show that the local government, as the programme initiator, can develop a mutual relationship with various civil society organisations. The programme covers environmental preservation and community forestry, contributed to reducing climate change impact in the long term. In addition, the programme is also supported by the private sector, leading to complete collaboration among triangle actors (government, civil society, and private sector). The findings add to our knowledge of climate change risk reduction by considering the collaboration processes among the actors. It is also helpful to strengthen the practice of climate change mitigation.