Today's sociopolitical and economic conditions require adults to engage in informed, culturally sensitive coexistence. Correspondingly, adult educators need to design experiences that help prepare learners for cross-cultural collaboration and socially responsible careers in a global age. Framed through cosmopolitanism and situated learning theories, the purpose of this study was to investigate adult learners' sense and development of global citizenship through engagement in an innovative itinerant master's degree program. The investigation of the experiences and contexts of this program's community of practice provides important insight into adult global citizenship development and cosmopolitan instruction.