Assistant professor at the University of Palermo, Department of Engineering. He is operating agent of the International Energy Agency – Energy in Buildings and Construction Annex 83 – Positive Energy Districts workgroup and co-chair of the IWG 5 of the EU Setplan on Energy Efficiency in buildings with a focus on Sustainable materials and technologies for energy-efficient solutions for buildings. Author of more than 100 publications on international journals and proceedings, he is principal investigator of multiple research projects on the topic of Positive Energy Districts from multiple programs, including Driving Urban Transition (DUT), JPI Urban Europe, Clean energy transition partnership (CETP) and PRIN.