This essay aims to make an assessment regarding the management of the organizational change process and its effectiveness within a Brazilian familiar company. The object of this study is a health company that is going through a succession period and is in search of improving its professional profile. In order to achieve this goal, a field research and a quality analysis were realized, comparing the data obtained and the concepts identified in a selected literature. Data was collected through informal interviews, analysis of the company`s documents and as a participant observer, from July 2005 to January 2006. This study evaluates if the organizational change process has succeeded or not, also considering the model proposed by John P. Kotter for the efficient deployment of changes in organizations, comparing the eight-stage change process proposed by the author to what actually occurred in the company. The analysis of the change process led us to the conclusion that it was unsuccessful. The result of this research suggests that the eight-stage change process is applicable to the situation studied since it makes clear that several stages mentioned by the author were not followed and this fact has caused problems in the organizational change process.