The Nexus-Project is already possible to present global federate context model. The Nexus system provides the develop of the context-aware system. Context-aware system know the situation of the users or world clipping and adapt their information's selection and information's presentation, accomplish the actions or annotate their context. So the acquisition, control and update for the context information is expensive and costly. Dynamic binding for service in Workflow is nowadays widely common. However there is barely little approach service based on context information for example the location to control and to bind. This will be realized by the Nexus world model. In runtime the dynamic binding ofWeb-Service is center function by the Workflows. This is always realized by the directory service like UDDI. This thesis should realize the dynamic binding of the context-aware service. Besides the context data of a Web-Service must be in Nexus environment model stored. Finally a Workflow engine should be arranged, that it use the context-aware directory service for dynamic binding the service.