Marek Królikowski was born in Warsaw, Poland, in 1982. Since 2019, he has held the position of Associate Professor at Warsaw University of Technology (WUT) in Warsaw, Poland. He obtained his Master’s degrees in 2007 and his Ph.D. in 2011, both from WUT. His current research interests focus on the intensification of chemical processes using new functional fluid materials such as ionic liquids (ILs) and deep eutectic solvents (DES), as well as their application in separation processes. His doctoral thesis centered on the extraction of aromatics from aliphatic hydrocarbons using ILs, while his postdoctoral thesis extended this research to separation processes using ILs and DES in liquid fuel desulfurization. Currently, he is conducting research on Phase Change Materials (PCMs) with applications in medicine, industry, energy, and the building sector. He has contributed to over 80 peer-reviewed articles in international journals covering chemical, environmental, and chemical engineering topics. Additionally, he delivers lectures and conducts computer laboratories for students in the first semester of the second-degree program titled ’Physicochemistry of Solutions and Phase Equilibria I.’ As part of his teaching responsibilities, he also leads exercises and laboratories in physical chemistry for the Chemical Technology and Biotechnology courses. Numerous engineering and master’s theses on topics in physical chemistry are being completed under his supervision.