Prof. Dr. Vassil B. Delchev received his Ph.D. in Theoretical Chemistry in 2002 and his Doctor of Sciences in Physical Chemistry (Quantum Chemistry) in 2013. He began his academic career (habilitation) as an Associate Professor in the Department of Physical Chemistry at the University of Plovdiv in 2007 and was promoted to Professor in 2016. His research focuses on theoretical organic chemistry and biochemistry, including studying molecular conformations, hydrogen bonds, proton transfer, and the photochemistry of nucleic acid bases.