Christian Hill is a physicist and chemist. He is currently Head of the IAEA's Atomic and Molecular Data Unit. His previous research was based at UCL where he was a member of the ExoMol research group which calculates high-temperature line lists for modelling exoplanet atmospheres. He has taught a course in Python programming at UCL's Department of Physics and Astronomy and also taught Physical Chemistry at Somerville College, a constituent college of the University of Oxford.
Christian's website contains more information.