This article explores the role that public service values play in the work of public administrators. The argument made here is that a virtue ethics approach rooted in the concept of a practice is a particularly helpful way of understanding public service values as a contextualized set of attitudes, skills, and behaviors that enable us to realize the goods, ends, and standards of excellence internal to the practice of public administration. Along those lines, the contextual factors associated with four ideal-type administrative roles-mediator, steward, magistrate, and advocate-are explored in order to highlight the manner in which values both create and mediate conflicts that arise between these roles.Over the past couple of decades, scholars, practitioners, and educators have paid an increasing amount of attention to the role that values play in the practice of public administration (e.g.,