The importance of development and training during post-merger integration process are neglected. In this paper, the role of the individual in corporate culture clash situations, during post-merger integration, is presented. The effects of culture clash in mergers and acquisitions ( M&A) on acquired management attitudes and behavior are discussed. It is proposed that these effects influence post-merger turnover and integration success. Therefore, development and training during post-merger integration, to deal with the effects of culture clash situations in M&A, are pivotal for success. The implications of these ideas for research and practice are discussed. (C) 2015 The Authors. Published by Elsevier Ltd.