Should managers be more trained in the topic of diversity? Must they develop specific skills and competences? Which strengths and weaknesses regarding diversity management do managers have? A qualitative investigation tried to answer these questions. Around 70 interviews with managers and employees of large DAX companies were conducted. It could be shown that there are tensions between self-perception and perception of others and the assessment of the significance of diversity attitudes and measures, competences, and their actual implementation. These findings suggest that there is the need to train competences, in particular intercultural competence.