This paper describes the requirements and high-level design of a service-oriented architecture for demand- driven e-government. Central to this architecture is the integration of services from different government agencies and private parties to create truly demand- driven e-services to citizens. Starting from a descrip- tion of the requirements, we give a functional architec- ture and identify technologies that may be used to realize this functionality. This architecture is the first to combine service orientation, identity management, business process management, and semantic web tech- nologies to implement this vision of integrated, de- mand-driven services.