The purpose of this study is to explore how to facilitate for the sharing of high quality knowledge in a virtual global project team context. Consequently, this study presents an overview over selected theories, and enlightened by these theories investigates how the strength of social interaction ties between members in a virtual team affects the quality of work related knowledge shared in these ties. Social interaction ties are represented by strength of the relationships, the amount of time spent on interaction, interpersonal trust and communication frequency between the members in a virtual team. Whereas knowledge quality is defined as the extent to which the comprehension and awareness of relationships, logics and innovative ideas in a project are valuable and relevant. Based on case studies of 4 virtual global project teams with a total of 41 team members We found that competence-based trust ties was the component that had the greatest impact on this high quality knowledge sharing. Frequency of communication ties and time spent on interaction ties were found to have a positive effect and benevolence-based trust ties have some effect on the knowledge shared. Close relationship ties on the other hand are shown to only have a very small noticeable impact on the quality of knowledge shared between team members in a virtual team and the closeness of social interaction ties between members in a virtual global team does not affect the quality of knowledge shared. Virtual interaction in virtual global project teams does not require physical interaction to work, which is a significant finding not only for academia but also for any project manager. The empirical evidence shows support for the notion that the strength of the competence based interaction ties between members in a virtual team positively affects the quality of knowledge shared in these ties. The evidence also support that the quality of the virtual networking is affected by sharing the work process from concept development through all mile stone gates to the delivery. On line competence based relationships do not require off line competence based relationships to work. This means that a technology-based platform might give the social relationships needed for knowledge sharing.