Dion is currently the Associate Head (Quality & Delivery) for the School fo Criminology and Criminal Justice. He is a Principal Lecturer in Psychology and Offending Behaviour. His main research interests focus on Criminal Psychology, with his PhD exploring the differences between commuter and marauder serial offender profiles within the application of geographic profiling. 

In his lecturing role, Dion is involved at lecturing at all levels throughout the University, from lecture and seminar leading at undergraduate level, to supervising post-graduates. He is currently module coordinator for Abnormal Psychology and Mental Health and Wellbeing.

Dion is a Chartered Psychologist (CPsychol) with the British Psychological Society and is a Fellow of the Higher Education Academy (FHEA). He is also an External Examiner for the University of Worcester and the University of Northumbria.

Dion continues research within the space of Offender Profiling, with special interest in the application of Geoprofiling. His research branches out into Behavioural (Psychological) Analysis and it's application within investigations.

In addition, Dion has special research interests in Mental Health and Offending, and Mental Health within the broader CJS context.

Dion is currently a Principal Lecturer in Psychology & Offending Behaviour, and teaches across a vast spectrum from undergraduate to doctoral students. He is currently the module coordinator for Mental Health and Wellbeing, and Abnormal Psychology.