Various components of context aware middleware infrastructure work collectively to enable physical spaces to be transformed into computationally active and intelligent environments by providing context synthesis and provision services. In this paper, we discuss the requirement of physically separating the components of a context aware middleware in a distributed environment and present the design and implementation of Context Aware Middleware for Ubiquitous Systems (CAMUS)¹. Issues related to distributed coordination within the middleware in terms of component discovery and management and multiple context domains are also discussed in order to elaborate service oriented approach for providing context awareness in large scale ubiquitous environments.