Recent research endeavors have shown that knowledge sharing improves not only organizational idea development and innovation, but also work performance. In that matter, IS researchers have mostly focused on macro level analyses. We address this by developing a multilevel model for investigating the impact of organizational social web site (SWS) usage on individual and team performance. Our paper addresses this gap by drawing on existing guidelines for multilevel theorizing. We propose that team SWS usage impacts individual and team performance through its improved structural collaboration capabilities. Organizational learning, social capital, and network theories serve as the theoretical basis. Ultimately, we present a multilevel model as the foundation for future empirical research. Our research's contribution lies in the theoretical derivation of a multilevel model.