The paper presents the work on RFID-based user positioning and equipment localization for use in the Building management Systems, pursued by Intracom Telecom (ICOM) in the frame of the FP6 project I3CON. This work involves the development of integrated user interfaces allowing location and context aware operation of the mobile system including methods and tools for their implementation for Building Service Operation (BSO) applications. The RFID positioning is integrated into a Generic Object Browser (GOB) allowing access to building automation objects in realtime as well as static building database objects and properties using standard data communication protocols from a range of fixed and mobile terminals. Multimodal user interfaces were developed to allow hands-free intuitive operation of a mobile system with little need for manual operation and control.