This chapter focuses on how managers and sponsors of enterprise information system (EIS) projects can identify and manage stakeholders engaged in the project. This chapter argues that this activity should go beyond the traditional ideas about user participation and management involvement. Also suppliers, customers, government agencies, business partners, and the general public can have a clear interest in the ways that the system will be designed and implemented. This chapter proposes to apply identification, analysis, and intervention techniques from organization and management disciplines in the IS field to enhance the changes for the successfulness of enterprise information system implementations. Some of these techniques are combined in a coherent method that may help implementers of complex IS projects to identify and categorize stakeholders and to consider appropriate ways of involvement during the various stages of the project.