Abstract. Social identity research shows that leadership is a process of group identity development but has not examined how leaders can manage group identities in the workplace. The 5R leadership development program addresses this issue. This takes leaders through a five-stage process of (1) Readying: explaining the importance of social identity processes for leadership; (2) Reflecting: identifying important workplace social identities; (3) Representing: clarifying goals and aspirations associated with different subgroup identities; (4) Realizing: identifying superordinate goals and developing strategies to achieve both them and subgroup goals; and (5) Reporting: assessing progress toward goals. Results of a longitudinal study indicate that 5R is a useful framework for leadership development that translates insights from social identity theorizing into structured intervention.