Societies worldwide are facing a new class of security challenges posed by climate change. Although there is an ongoing debate about the causal mechanisms linking climate change to violent conflict, researchers and policy makers widely agree that climate-related change exacerbates existing vulnerabilities which undermines human security, societies well-being and indirectly influences violent conflicts. The burgeoning research examining how intergovernmental organizations are framing and responding to climate-related security risks shows that organizations with fundamentally different mandates are in the process of developing their work to conceptualize and integrate security risks posed by climate change. A general understanding is that the most effective policy approaches will consist of preventive measures applied to mitigate the adverse effects of climate change. Therefore, development organizations are key in addressing and mitigating climate-related security risks. This paper contributes to the growing research on how organizations are integrating climate-related security risks with a case study of how the Swedish International Development Cooperation Agency (Sida) is framing and developing its responses. In 2015, Sida was tasked by the Swedish government to integrate human rights, environment and climate, gender, and conflict in all its operations; from strategies and policies to monitoring and evaluation of the practical implementation and results. This makes Sida a well-suited case of how an organization is integrating climate-related security risks in its policies and practices. Based on document analysis and 15 semi-structured interviews with 24 Sida staff in Stockholm and at embassies in the Horn of Africa, the analysis contributes with insights on the relationship between environmental and climate change to the discourse of peace and conflict; how integrated approaches are being implemented; and how organizational factors contribute to the preconditions for addressing and mitigating with climate-related security risks.