Rhys joined Newcastle University from Cardiff University in August 2017. He is an Honorary Consultant in Epilepsy at the Royal Victoria Infirmary, where he leads on epilepsy and learning disability, genetic testing in the epilepsies and epilepsy in mitochondrial disorders.
His research interests include the causes and consequences of epilepsy – primarily the genetic causes of the epilepsies. He also works with SUDEP Action to study patterns of premature mortality in epilepsy.
Rhys was the 2017 Royal College of Physicians Linacre lecturer. He spoke about the risks and benefits of Sodium Valproate for women of child-bearing age.