Workplace stress has emerged as a critical global issue with far reaching implications for employees, organisations, and the broader economy. The constant and rapid evolution of work environments has intensified job complexity, resulting in increased demands that often exceed employees’ available resources and capabilities, ultimately affecting their overall well-being. This study investigates the relationship between workplace stress and workplace well-being, focusing on the moderating role of supportive leadership. A quantitative survey was conducted among employees in a policy organisation within the public administration sector in Malaysia, yielding 110 valid responses. Data were analysed using the Statistical Package for the Social Sciences (SPSS) for coding and descriptive statistics, while structural equation modelling and hypothesis testing were conducted using SmartPLS. The findings from the structural model indicate that supportive leadership moderates the relationship between workplace stress and workplace well-being. The study contributes to the literature by offering empirical evidence and several research propositions. It concludes with practical implications for leadership strategies and organisational policy, particularly highlighting the importance of supportive leadership in promoting a healthier, more resilient workforce.