ABSTRACT In contrast to the other papers in this special issue, this paper reflects a specific case of co-agency between states and individual migrants, particularly students and alumni networks. Based on a qualitative case study with 29 Georgian students and 14 institutions and organizations, this paper explores the impact of Georgian alumni on polity building in Georgia. Here we can observe two phases: Firstly, the states of Georgia and of Germany act as co-agents by facilitating migration to young Georgian students by financing their studies in Germany (student scholarships) with the objective that the students return and transfer their knowledge to the country of origin. Subsequently, the Georgian alumni who studied law in Germany act as co-agents between different institutions in both countries. In doing so, they transform state institutions by themselves and contribute to the development of the legal and political system in Georgia. They do that particularly in such important legal fields like constitutional law, civic law, and criminal law, but also in the creation of parliamentarism based on a bicameral system or the promotion of separation of church and state in Georgia. That takes place after return migration as well as from Germany through transnational networks and mobility.