Abstract: | The purpose of this study is to investigate the relationship between social media usage for work purposes and employee job satisfaction in the public sector. Because social media is a relatively recent phenomenon, the ways in which it affects employee attitudes such as job satisfaction are not well-known. Using self-determination theory (SDT) as a framework, this study tests whether perceived competence, relatedness, and autonomy mediate the relationship between social media usage for work purposes and employee job satisfaction. Data were obtained from the Australian Public Service Commission (APSC). Overall, results generated from the structural equation models support SDT, suggesting that employees using social media for work purposes have higher self-determination and higher self-determination increases their job satisfaction. In particular, the effect of competence to job satisfaction is very high. However, while social media usage for work purposes can enhance employees’ need for autonomy and competence, it does not have any statistical effect to employees need for relatedness. In addition, social media does not have any statistical and direct effect to job satisfaction. The results suggest that social media has an indirect effect to job satisfaction. This article discusses the implications of these findings. |