Transnational academic mobility and the ongoing push towards "internationalization" together raise challenges for the cultural climate of today's universities. This paper explores these issues from the perspective of supervisors of research degrees in an Australian university in which "internationalization" and "academic mobility" apply to supervisors as much as to students. The concepts of the imagined community and cosmopolitanism are employed to interpret a series of one-on-one and group interviews conducted with international academic staff, conversations which reported surprisingly untroubled negotiation of cultural difference. Using the insights provided by the concepts of "imagined community" and "cosmopolitanism", we investigate the mechanisms mobilized by these supervisors in apparently backgrounding cultural diversity in the workplace, and consider the implications of the academic subjectivities they perform.