The efficiency of non-profit organisations depends on effective human resource management practices. This chapter investigates the intricate circumstances of volunteer retention by exploring the serial mediating roles of job satisfaction (JS) and affective commitment (AC) in the influence of perceived organisational support (POS) on volunteers’ decision to keep volunteering. The study used a self-administered survey questionnaire to collect a total number of 213 useable data from volunteers of five community non-profit organisations in Queensland, Australia. The proposed hypotheses were validated from analysing the data collected and the results provide a statistical significant support that intention to keep volunteering is influenced directly and indirectly (through JS and AC) by perceived organisational support. The findings emphasise the significance of a supportive environment as a strategic tool for fostering volunteers’ intention to remain engaged, with JS and AC serving as vital mediating factors. Lastly, the theoretical, managerial implications, and limitations are discussed.