It is the mission of the Semantic Execution Environment (SEE) unit to create and enable execution environments for the design, dynamic discovery, selection, mediation, invocation and inter-operation of ontology-empowered services. Our solutions comprise design and implementation of Semantic Web Services, as well as components for streamed and static data processing and management, Linked Data based services, mobile and Internet of Things services, services for information management and integration, participatory networked services and interfaces. The solutions are being applied to numerous sectors, including energy efficiency, transport, health, Ambient Assistant Living, security, eCommerce, tourism.