Since its inception in 2001, the African Union (AU) has steadily expanded its normative frameworks and political missions across the continent. Unlike the Organisation of African Unity’s (OAU) interventions, which were substantially impeded by its principle of non-interference, the AU has adopted a non-indifference principle and has also opened itself up to greater engagement with a diverse range of actors: from multilateral agencies and international financial institutions to the private sector and, most critically, civil society organizations. This transformation marked a shift from a largely state-centric model to one of human security, underpinned by a decentralization agenda that aims to protect citizens from the grotesque excesses of states’ (in)actions which violate their rights. This paper traces these developments and provides suggestions on how to further strengthen AU peacebuilding approaches and the engagement of civil society organizations. The first section assesses the institutional and normative underpinnings of the AU peacebuilding framework and its refinement over time. Section two highlights various channels that civil society organizations (CSOs) can leverage in order to support or engage with the work of the AU’s Post-Conflict Reconstruction and Development (PCRD) framework as well as their shortcomings. The final section presents ideas for how the AU and CSOs can strengthen their collaboration in the area of peacebuilding.