We examined the role of work-related emotions and personal resources operationalised as psychological capital (PsyCap) in the relationship between events occurring at work and employees’ work engagement. Using affective events theory and broaden-and-build theory as theoretical frameworks, we theorise that the perceived frequency of positive and negative events at work and work engagement is mediated by positive and negative work-related emotions and moderated by PsyCap. The results of path analysis on a sample of US and Polish employees showed that PsyCap moderated the relationship between the perceived frequency of negative work events and negative work-related emotions, however, we also found culture-specific effects of PsyCap. Our study contributes to the human resource development (HRD) literature by providing evidence of the role of personal resources in the event–emotion–engagement process in the workplace. Also, our findings deepen the understanding of HR developers in multinational organisations and provide suggestions on how they can implement PsyCap trainings based on culture-specific work environment.