Abstract: Over a period of 6 years, a South African pharmaceutical company had been involved in several mergers and acquisitions. These changes had proved difficult for staff and staff attrition had risen. Research purpose: The objective of the study was to explore the perceptions of senior managers about the impact of change on the psychological contract. The sub-objectives were to determine what organisational factors contribute to changes in the psychological contract during periods of change, and the implications of the breach of the psychological contract for the company and its employees. Motivation for the study: As the company was set to embark on further mergers and acquisitions, the opinions of senior managers about how such changes should be addressed are important for the company. Research design, approach and method: A case study approach was used in this qualitative study. The population comprised 60 senior managers of whom 12 were purposefully selected for inclusion in the study. A semi structured interview schedule was used to capture the views of these managers and themes were extracted by means of content analysis.