Following the acts of devastation conducted on September 11 2001, there is a growing fear that another terrorist attack is imminent. Hence there is a great demand for any tools that can identify potential attacks. We are developing a decision support system that will profile potential terrorist behaviour and provide a classification system predicting those persons who are most likely to partake in terrorist activity. The Jungian Myer Briggs personality model is being used to develop our decision support system. This model tests for personality typology and is a temperament sorter used for predicting behaviour, in particular determined fanaticism, aggressive behaviour and personality duality. Conference held in Melbourne 29th November to 1st December 2006