In order to optimize working processes of medical and healthcare organizations, the most recent trends in software development suggest the use of distributed, autonomous software services combined into specific information system, where various users can access the information they need in an easy and straight-forward manner. Semantic web technologies are state-of-the-art approach that should fulfill these requirements, but they are not a silver bullet. Therefore, in this paper we present some results of our endeavors in adopting SWT for medical software and services. First, SWT are incorporated with SOA principles and semantic web services execution ontology is defined, then the system architecture for automated execution of SWS in accordance with SWSEO is designed, and finally the improved SWT based system architecture is presented for developing unified medical software system and services.