Aim: The aim of our research is to explore and narrate the post-merger effects on employees' motivation and effective managerial role for the motivation management in the staff in Post-Merger Phase.

Methodology: The research is qualitative and covers both, the managerial and employees’ approach through application of Herzberg (1966) motivational theory to assess certain changes in employees’ motivation level during the Post-Merger phase. Primary data is sourced from face to face interviews of respondents and narrated in empirical findings. Analysis and conclusion are derived on the basis of the State of Art theories.

Conclusion: Merger affects the employees’ motivations by ignoring their motivational factors, communication and information sharing management. Managerial role is important to answer the employees’ job insecurities and maintain the level of their motivation effectively. Optimum employees-organization relationship can be secured through effective information and communication management for the success of corporate objectives and employees’ satisfaction.

Contribution: The research greatly contributes towards knowledge in management studies and relevant information is useful for business management students, managers, and Merger implementing management about certain aspects of consequential organizational changes and motivational factors of the workforce. The repeated research to periodically observe the staff's motivation and effective managerial implements can enhance in-depth knowledge of potential effective remedies especially for new and possibly merging organizations. Through such kind of research works, Merger failure rate can be reduced and overcome gradually that result due to employee’s diminishing motivations at workplace and management's’ failure to take cognizance of Post-Merger changes in employee’s behaviour