Rapidly expanding applications of software services, in particular in the context of cloud computing, demand close collaboration of research community and industry practitioners in the development of comprehensive and reliable methodologies and tools that support the entire service systems development lifecycle (SDLC). Development of service-oriented applications presents specific challenges as such applications tend to be process-driven, loosely-coupled, and composed from autonomous services supported by diverse systems. Service-oriented applications typically need to provide multiple, flexible and sometimes situational interaction channels within and beyond organizational structures and processes. Engineering of such software systems requires collaborative and cross-disciplinary development processes, methodologies and tools capable of addressing multiple SDLCs of various service artifacts. There is an urgent need for research community and industry practitioners to agree on comprehensive engineering principles, methodologies and develop tools to support for the entire SDLC of service-oriented applications.