It is widely recognized that leadership behaviors drive leaders' success. But despite the importance of assessing leadership behavior for selection and development, current measurement practices are limited. This study contributes to the literature by examining the structured interview method as a potential approach to assess leadership behavior. To this end, we developed a structured interview measuring constructs from Yukl's (2012) leadership taxonomy. Supervisors in diverse positions participated in the interview as part of a leadership assessment program. Confirmatory factor analyses supported the assumption that leadership constructs could be assessed as distinct interview dimensions. Results further showed that interview ratings predicted a variety of leadership outcomes (supervisors' annual income, ratings of situational leader effectiveness, subordinates' well-being and affective organizational commitment) beyond other relevant predictors. Findings offer implications on how to identify leaders who have a positive impact on their subordinates, and they inform us about conceptual differences between leadership measures.