This book constitutes revised selected papers from the 12th and 13th International Conference on Cloud Computing and Services Science , CLOSER 2022 and CLOSER 2023, which took place as a virtual event in April 2022 and in Prague, Czech Republic, in April 2023.

Security Aware Scheduling of Multiple Scientific Workflows in Cloud.- Empowering Statistical Analysis in FaaS Environments Through the Orama Framework.- Evaluating Microservices Communication Relationships for Scheduling Containers on Kubernetes Clusters.- Security Evaluation in Software Defined Networks.- A Distributed Tool for Monitoring and Benchmarking a National Federated Cloud.- Metamodel and Formalization to Model, Deploy, and Execute Quantum Workflows.- Edge AI Deployment and Stream Based Time Series Classification Within ARTHUR.- Misconfiguration of Cluster and IoT Systems Recovery Extended Experiments.- Orchestrating Applications in the Cloud to Edge Continuum with Sophos.- Fog Robotics Infrastructures Simulation based Sizing Approach.