Sergey Sayenko is a Head of Research Department in the Kharkiv Institute of Physics and Technology in Ukraine. He earned his Ph.D. degree on topics related to the spent nuclear fuel isolation (2003) and has a Dr.Sc degree in environmental safety of RAW (2011). The focus of Dr. Sayenko’s joint USA/Ukraine programs, which began in 2011, is the development and study of MKP materials proposed for the safe sequestration of nuclear waste. Нe has been conducting research work since 2022 temporarily at the Nuclear Research Institute (ÚJV Řež), Czech Republic.