Digital Twins (DT) are implemented as virtual models accurately reflecting physical objects. This is based on sensing/monitoring of physical objects and enables modelling, simulation and performance study over the digital copy. Our team applies Digital Twin technologies in a wide spectrum of applications (mobility and transport, circular economy, food/bioeconomy etc.) to support simulations and systems modelling at component, asset, system or process level with ultimate scope over decision making support, process adaptation, efficiency and sustainability.