PESOS 2015 forum seeks contributions addressing, but not limited to, the following topics related to design, development, deployment, use, and integration of software, human and collaborative services in the Cloud. Service engineering for elasticity, scalability, monitorability, and other attributes expected of Cloud-based services and collaboration processes Frameworks and architectures for service collaboration in the Cloud Collaboration as services Elastic business process management in the Cloud Requirement engineering issues for Cloud-based collaborative services Methods and tools for design-time software engineering support for desired run-time collaboration behavior in the cloud Adaptation and evolution of collaborative Cloud services Service personalization and context-aware provisioning in the Cloud Service delivery models for mobile applications. Frameworks and programming model for IoT (Internet of Things) and IoE (Internet of Everything) services and their integration to Cloud Service dependability, survivability, reliability and resilience Trust, security, and privacy in Cloud-based services Quality of service (QoS), Service-level Agreements (SLAs) in the Cloud Verification and validation of service-oriented systems Migration to service-oriented systems in the Cloud Cloud requirements and design for growing markets.