For professionals in the IT industry it is important to have easy access to knowledge about the day-to-day business processes. Such knowledge, which is called method knowledge, can be made easy accessible through a knowledge repository system. One factor that determines the accessibility of method knowledge in such a repository is the way in which this knowledge is structured and made accessible. This paper presents a meta-modeling technique for modeling knowledge structures. The technique is called Knowledge Entry Map and supports the design of knowledge repository systems based on topic maps. To validate the technique it has been applied in two case studies in the professional IT industry, a software developer and a service provider. The case studies demonstrate the applicability of the meta-modeling technique for capturing the structure of method knowledge in IT organizations. Moreover, the case studies provided the idea of a generic method knowledge structure for project-oriented and product-oriented IT organizations.