Arnau González is an Aeronautical Engineer and holds a PhD in Environmental Engineering from the Universitat Politècnica de Catalunya (UPC). Since 2017 he is part of the team at Aiguasol, a consultancy specialising in innovative solutions in energy and built environments, where he coordinates innovation and consultancy projects. Arnau is an expert in renewable energies, sustainability and Circular Economy, as well as working in environmental and economic modelling and analysis of energy systems and buildings. Arnau is also an adjunct professor at the Tecnocampus Mataró - Maresme of the UPF, where he collaborates with the Chair of Circular Economy.