This article develops a "eudaimonistic" account of professional virtue. Using the case of teaching, the article argues that professional virtue requires that role holders care about the ends of their work. Care is understood in terms of an investment of the self. Virtuous role holders are invested in their practice in a way that makes professional excellence part of their own good. Failure to care about the ends of professional practice reveals a lack of appreciation of the value of professional work. This "investment view" is contrasted with the currently popular "key goods view", which claims that professional virtues require a profession-specific teleological structure. Unlike ordinary virtues, which are governed by "eudaimonia" or human flourishing, professional virtues are allegedly derived from professional ends, like health or education. The article argues that this delivers an unconvincing criterion for determining the merits of character traits.