[영문]Human service agency cultures are often difficult to understand. Competing values and paradoxical assumptions add to that difficulty. In this study, we use a well-established framework for organizational analysis to establish a tool to assess differing values and assumptions in diverse field agencies. A total of 200 MSW field instructors responded to a mailed survey at a 50% response rate. Comparisons of responses by participants in private and public agencies revealed that public agencies tended to have more traditional cultures than nonprofit agencies. Younger agencies were more likely to score higher than older agencies on items representing alternative perspectives. Participants perceived their organizations as straddling multiple perspectives. Knowing what values and assumptions are dominant within an organization may allow the professional to assess his or her fit within that organization and how to approach change within respective cultures.