Within the past decades the cultural approach of organizations became more and more popular, so that it augmented to a quite innovative area. Thus culture earns high attention amongst organizations. Culture became a soft skill tool to cross over the traditional micro- and macro-level of organizational analysis. The underlying working paper discusses the interde-pendency of culture on an organisational and project level. Besides the analysis of the culture life cycle during the project development and the influence of the pro-ject completion on the project team members, the paper peruses to what extent can a living project culture contribute to a successful project completion? The main topic of the working paper remains to find out how the cultural effects, developed on the project level, on the invisible frame and the core values of an organization, for the organization, can be made profitably visible. The findings to answer this question are based on an extensive and analytical research on the term culture in different works on organizational and project management theory. To bring a com-parison of the theory and show the practical relevance of the topic, interviews with experts were conducted. The interviews were analysed and compared with the aspects of the theory. The interview partners are employed at an internationally operating company, headquartered in Vienna, operating on different structural lev-els: Regional Managers, Project Managers, Controller, Finance, Architectural, Functional Planning, Purchasing and Logistics. The opinions of the experts were consistent with the theoretical analysis. There is a high level of interdependencies between the organisational and project culture. The project management should be integrated into the followed organizational strategy, know the structure, under-stand how the organization functions. Furthermore is important to be familiar with processes, as well as the knowledge and capabilities of the own project stuff is crucial. An international project is dynamic, complex and risky. It includes a high diversity of national cultures, international cultures, and functional cultures as well as the social and educational background of the actors. This working paper wants to draw the attention of the project managers and the organizations to the im-portance of culture and all other soft skills related to it. This can motivate the crew, allows a higher effectivity and efficiency in the project development.