This research delves into the intricate connections among family support dimensions, specifically instrumental support and emotional sustenance, and their impact on in-role performance, utilizing work engagement as a mediating variable. A comprehensive survey involving 421 Vietnamese employees was conducted, and the data underwent PLS-SEM analysis. The outcomes reveal a positive influence of both instrumental support and emotional sustenance on each dimension of work engagement—cognitive, physical, and emotional engagement. Additionally, all facets of work engagement exhibit a positive relationship with in-role performance. Furthermore, each sub-variable of work engagement acts as a mediator in the relationship between instrumental assistance, emotional sustenance, and in-role performance. Notably, the study emphasizes that instrumental support exerts a more substantial predictive power concerning in-role performance compared to emotional sustenance. These findings contribute significantly to both theoretical understanding and practical applications within the realm of family support dynamics and employee performance, enhancing our comprehension of these critical relationships.
