Although many studies have investigated the contributing factors of workplace bullying, most have focussed on organisational factors, and few have explored the notion of personality as a contributory factor. This thesis represents an attempt to remedy this deficiency and to throw some light on the role played by personality. This thesis is based on three main studies and is divided into six main sections: The first explores the literature of bullying behaviour and personality; the second examines the antecedents of workplace bullying; the third and fourth sections explore the notion of a victim and bully profile respectively; the fifth section examines bullying at an organisational level, and the sixth section includes a final discussion of findings in this thesis.