Knowledge sharing (KS) and organizational citizenship behavior (OCB) among project team members are crucial for project success. The IS project team is a temporary organization and has to produce outcomes in a limited time. We investigate how internal and external social capital (SoC) influence KS and OCB within a team and how OCB and KS affect project success. We also analyze the relationships between the three SoC dimensions through multi-level approach. A statistical testing has not been complete. We will explore both HLM6 and MPLUS for multiple structural equation modeling and introduce a comparative analysis of each set of results. We expect the results of the research can provide project managers with insights on how to encourage project team members to share their knowledge and build teamwork more efficiently