This article examines how different personality types create and benefit fr
om social networks in organizations. Using data from a 116-member high-tech
nology firm, we tested how self-monitoring orientation and network position
related to work performance. First, chameleon-like high self-monitors were
more likely than true-to-themselves low self-monitors to occupy central po
sitions in social networks. Second, for high (but not for low) self-monitor
s, longer service in the organization related to the occupancy of strategic
ally advantageous network positions. Third, self-monitoring and centrality
in social networks independently predicted individuals' workplace performan
ce. The results paint a picture of people shaping the networks that constra
in and enable performance.