His research group investigates the evolution of stars, stellar winds, and supernovae. For his research, he employs both theoretical and observational techniques, such as radiative transfer modeling, numerical stellar evolution, optical interferometry and spectroscopy. Before moving to Trinity, Prof Groh held an Ambizione award at Geneva Observatory (Switzerland) and was a Senior Research Fellow at the Max-Planck-Institute for Radioastronomy in Bonn (Germany). He obtained his PhD from the University of Sao Paulo (Brazil). He is an elected member of the International Astronomical Union Massive Star Commission.