Dr Guillermo Zaragoza is a senior researcher in Spanish Research Centre CIEMAT, currently head of the Solar Thermal Applications R&D unit of Plataforma Solar de Almería (PSA), Spain. He is also co-leader of the “Desalination and Photosynthesis” R&D Unit of CIESOL (joint centre of University of Almería and CIEMAT), and director of the Sustainable Desalination Living Lab. His main research is focused on the application of solar energy to desalination in the water-energy-food nexus. In particular, his main expertise is membrane distillation, having worked during several years with solar-powered membrane distillation at pilot scale. He has coordinated CIEMAT’s participation in 11 EU R&D&I projects, and participated in more than 20 international R&D&I projects and contracts with companies, leading the “Solar Desalination” research activities at PSA- CIEMAT. Guillermo Zaragoza has a PhD in Physics, has held academic positions at the University of Oxford and the Spanish Research Council, as well as the greenhouse technology research facility of Cajamar Foundation. He has a long academic record and extensive experience in international R&D projects, teaches in the master course on Solar Energy of the University of Almería, is ambassador of Water Europe and leader of its Working Group on Renewable Energy Desalination.