The aim of this thesis was to study changes caused by organizational change in the client organization, and its effects on communication, well-being at work and coping with work. The purpose was to create concrete ideas to ease future change-situations and to improve communications and the well-being of employees at work.

First the theorethical part of the thesis explains the theory of change and change management. After this the theory of communication and communication in change situations is discussed. In the end of theoretical part, the theory of well-being at work and the factors that well-being is built on are explored.

The research part combines both qualitative and quantitative research. Surveys conducted earlier in the target company about integration and well-being at work among clerical workers represent quantitative research. Qualitative research was executed as follow-up interviews about the previous surveys among clerical workers to share their experiences about the organizational change, communication, and well-being at work. Concrete ideas were also collected. In the end of theoretical part, the ideas are summarised in the form of a figure.

Based on the results there are some positive aspects, but also some elements need to be developed further regarding the well-being of employees of the client organization. The purpose of the research was achieved because the thesis was able to produce concrete ideas to develop and support the areas under research.