Social media has slowly become ubiquitous in the workplace; however, the use of these technologies has been associated with both positive and negative consequences. Using the JD-R model, this study examines these positive and negative consequences of the public social media use for work. Survey data of 421 employees is used to explore the relationship between public social media use for work and engagement, and exhaustion, through opposing mechanisms. The findings demonstrate that interruptions and work–life conflict are important demands, whereas accessibility and efficient communication are resources associated with social media use for work. These demands and resources are related to engagement and exhaustion.