In this chapter, the authors outline some of the history of the role of diversity in research and research management, how this has changed and the consequences it has for a workable definition of diversity. We describe the benefits and challenges when working with diversity as research managers and administrators (RMAs) in international research producing organisations (RPOs). The challenges differ in different parts of the world which brings new complexities to navigate. It is shown how the agendas of internationalisation and diversity do not always work well together due to cultural and political perspectives in areas including race, age, gender identity, sexual orientation and other characteristics. The authors suggest how 'Cultural Intelligence' (CI) can be used as a frame for RMAs working with diversity and internationalisation both in a pre-and post-award phase and outline some specific steps and initiatives RMAs can take to create equitable and inclusive research and research environments based on their practical experience in the sector.