This chapter purposefully studies citizen engagement in alternative grid management schemes in the two largest cities of Germany, Berlin and Hamburg. In qualitative case studies from Berlin and Hamburg, it explores how community energy actors disrupt and (re)interpret systems of energy distribution. The chapter presents the community energy projects in Berlin and Hamburg and discusses the changes to the political, material and symbolic infrastructure of energy systems in Germany's two largest cities. The cases of Berlin and Hamburg present examples of community energy projects as movements of energy transition, the simultaneous and interrelated change in social and technical infrastructures; rather than energy transformation, a shift in technology. The Berlin and Hamburg cases of citizen engagement in infrastructure design and decision-making showcase how closer proximity to energy infrastructures in renewable systems intersects with stronger claims of voice and inclusion in related decision-making processes and revenue streams.