This paper proposes a hybrid approach for managing knowledge within companies based on communication between people. In addition to traditional Knowledge Management Systems our concept supports employees not only in finding information but also in establishing contact between the person requesting information and a person or community that can help solve the problem. This hybrid approach consists of a machine part and a network of human Knowledge Brokers (KBs). The machine part could answer requests about an area of expertise if the system has already recorded relationships to experts in this field. We use different search methods to offer a Personalised and Interactive Knowledge Retrieval to the user. Keywords Knowledge management, knowledge broker, knowledge broker network, hybrid man machine system, semantic network, semantic search, knowledge retrieval