This study explores the well-being (engagement) and work fulfilment of 628 blue-collar workers as outcomes of decent work, based on the Psychology of Working Theory and its target group. It takes a positive preventative approach and demonstrates the motivational role of work engagement and psychological ownership in contributing to the work fulfilment of blue-collar workers experiencing decent work. Data was collected from a South African-owned trailer manufacturing company. The results show a positive relationship between decent work and work fulfilment, with work engagement mediating this relationship. Additionally, psychological ownership positively moderates the relationship between decent work and work engagement. This study adds insights into the underlying mechanism (work engagement) that elucidates how decent work relates to work fulfilment. This study sheds light on how decent work contributes to work fulfilment through work engagement. Furthermore, suggesting that this relationship is stronger for blue-collar workers with higher levels of psychological ownership.