Mattheos Santamouris is a Scientia Distinguished Professor of High-Performance Architecture at UNSW Sydney, and past professor at the University of Athens, Greece. His research focuses on energy conservation in high-performance architecture, notably heat-mitigation strategies to curb urban overheating.

Mat has acted as scientific coordinator for numerous international research programs, including Zero Plus: European Horizon Research Project on Zero Emission Settlements, and has reviewed research projects in 15 countries including the US, UK, France, Germany, Canada, and Sweden.

He is currently the editor in chief of Energy and Buildings, and associate editor of Solar Energy Journal. He has edited and authored 15 books on topics related to heat island, solar energy, and energy conservation in buildings.