**About the Editors**

**Jeong Ik Lee** was educated at Seoul National University at the Department of Nuclear Engineering until 2003. In 2007, he completed his Ph.D. degree in Nuclear Science and Engineering from Massachusetts Institute of Technology with support from the MIT Manson Benedict Fellowship. In 2010, he took up an assistant professorship in KAIST and moved to UAE to join Khalifa University of Science and Technology as a Joint-Professor in the Nuclear Engineering program. After staying in UAE for one year, he came back to KAIST and was promoted to Associate Professor in 2015. In 2017, he stayed at the University of Cambridge as a visiting scholar for one year and was involved in developing innovative nuclear systems. His research group in KAIST is very active in the area of supercritical CO<sup>2</sup> power cycle technology development. His research group is not only working on nuclear energy systems but also expanding the application area of the technology to the waste heat recovery systems for gas turbines and fuel cells. Research on the supercritical CO2-cooled micro modular nuclear reactor was recognized as the top ten research achievements of KAIST in 2014. He collaborated with domestic and international companies to develop an appropriate waste heat recovery system with the supercritical CO<sup>2</sup> power system technology.

**David S ´anchez** is a Full Professor of Energy Systems and Turbomachinery at the Department of Energy Engineering of the University of Seville. At this institution, he obtained his MSc in Mechanical Engineering in 2001 and, in 2005, he completed a Ph.D. working on the smart integration of high-temperature fuel cells and bottoming heat engines such as micro gas turbines, Stirling engines or supercritical CO<sup>2</sup> power cycles. At the same time, he expanded his postgraduate education with a specialization in the area of gas turbines at international institutions like Cranfield University (United Kingdom) and the Von Karman Institute for Fluid Dynamics (Belgium). Throughout his career, he has provided support to the Concentrated Solar Power industry under development in Spain and worldwide. His research interests remain focused on gas turbines for power generation applications, with a focus on micro gas turbine systems, he has been very active in the development of supercritical CO<sup>2</sup> technologies for concentrated solar power applications in the last decade. This research interest has, more recently, expanded into the combined production of power and water, along with the growing concern about the water–energy nexus raised by the scientific communities and governments. These activities are funded through national and international R&D programs and also through industrial sponsorship.
