He began his career as a psychophysiologist studying the integration of visual information in the occipital lobe underlying the processes of stereovision, and the distribution of processing of visual motion in the occipital, temporal, and parietal lobes. More recently he has studied the influence of the psychological environment on employee behaviour within the Tourism and Hospitality industry, and he is currently a lecturer in management at the University of the Sunshine Coast. Mark sees his work on Legion Theory as his most important work.