Abstract
The study investigates the impact of encouraging supervisor behavior on enjoying success at work. Further, it examines the mediating role of psychological well-being on the relationship between family support supervisor behaviour and thriving among Nurses in a tertiary health institution in Nigeria. One hundred and fifty nurses participated in the study. The hypothesized model was used to test descriptive and structural equation modelling. Findings failed to support hypothesis one as no direct relationship exists between family support supervisor behaviour and thriving at work. The results supported hypotheses two and three, indicating a positive and significant relationship between family supportive supervisor behaviour, thriving and psychological well-being. Furthermore, psychological well-being successfully mediates the relationship between family support supervisor behaviour and thriving at work; thus, hypothesis four was supported. Family-support supervisor behaviour policies and programmes may not be sufficient to promote thriving at work as other intervening factors could enhance its effectiveness.