Today’s project complexity is constantly increasing leading to multidisciplinary project teams. Building a truly integrated team in projects where a partnership is necessary in order to achieve the desired outcome isn’t a one-off process that can occur automatically. It’s a procedure that has to be built up over a certain period of time (mostly during the front-end development phase) under a collaboration that will utilize in the best way the benefits of this one-team approach. In international projects cultural differences between the different teams is an important aspect that adds an additional challenge in reaching a successful outcome. It is therefore the project manager’s responsibility to create a team of engaged and committed people that have an aligned project goal and act as a whole and not as a set of wholes. Getting from cooperation to collaboration requires the presence of both a strong project leader and a competent project team.