Constantinos A. Balaras is a research director at IERSD-NOA and a mechanical engineer with a PhD (1988) and an MSc (1985) in thermal sciences from the Georgia Institute of Technology, and a BSc (1984) in energy from Michigan Technological University. Leader of Group Energy Conservation at IERSD-NOA since 1995. His research interests are in the areas of energy conservation and high-performance buildings and decarbonization; sustainability assessment of buildings, neighborhoods, and cities; climate change adaptation and environmental impact assessment; energy audits and refurbishment; embodied energy; solar, thermal, and cooling applications; the analysis and numerical modeling of thermal energy systems; indoor environmental quality; and HVAC systems. He was instrumental in the development of the technical guidelines and national regulation of the energy performance of buildings (KENAK) for EPBD transposition in Greece. He is an editorial board member for “Energy & Buildings”, and he has served as an ASHRAE vice president (2011–2013), director-at-large (DAL) (2007–2010) and director and regional chair (DRC) for Region XIV (2017–2020). He is a chartered mechanical engineer and member of the Technical Chamber of Greece, an EUR ING, an ASME Fellow, and an ASHRAE Fellow.