 Prior to joining the University of Bristol he was Feodor Lynen Fellow of the Alexander von Humboldt Foundation at Brown University working with Arto Nurmikko.Kuball is known for his research into thermal characterization and reliability of electronic materials and devices, with particular focus on wide bandgap semiconductors, and RF and power electronic devices.He pioneered techniques such as Raman thermography, based on Raman spectroscopy, to determine temperature in devices with submicron spatial resolution and nanosecond time resolution, and numerous other techniques for the thermal  and electrical characterization of materials and devices including for understanding device reliability.