Conflicts are an inherent component of any work environment and may contribute constructively to organisational life if they are approached in a constructive and cooperative way. The aim of this research survey is to explore the extent to which the transformational, transactional and laissez-faire leadership types impact conflict management, through a case study in the field of Greek Public Procurement. For the research analysis, methods of the statistical package of SPSS 17.00 were used. The transformational and transactional leadership types were found to be positively correlated with the constructive conflict management approach and negatively correlated with the non-constructive conflict management approach, while the statistical outcomes found the overall impact of transformational leadership to be comparatively stronger. In contrast, laissez-faire leadership was found to be positively correlated with the non-constructive conflict management approach and negatively correlated with the constructive conflict management approach.