The rise of hybrid work models has intensified the demand for structured employee development interventions as a driver of organisational performance. This study investigates the impact of a hybrid learning intervention—integrating instructor-led training, self-paced e-learning, gamified simulations, on-the-job training, and live projects—on employee performance in the Indian financial services sector. Guided by Lewin’s three-stage change model, the intervention was designed to ‘unfreeze’ existing performance patterns, enable capability development, and ‘refreeze’ new behaviours in first-line managerial roles. Two approaches were employed. First, a longitudinal analysis of 458 employees assessed performance before and after the intervention using a one-sample t-test, confirming significant performance improvements. Second, a between-group comparison of 328 internally promoted employees (exposed to the intervention) and 328 externally hired counterparts applied two-sample t-tests and regression analysis. Findings revealed significant performance differences favouring internally developed employees. While regression models showed low explanatory power (R² = 0.041 for the sample group; R² = 0.006 for the control group), the statistically significant results highlight the practical value of hybrid interventions for HR practitioners. Insights are particularly relevant for South Asian organisations facing skill gaps, attrition, and uneven training access. The study concludes that hybrid interventions offer cost-efficient, scalable, and inclusive solutions for workforce development. Limitations include the absence of SBU-specific analysis and consideration of individual learning styles. Future research should examine moderating factors such as leadership support and disentangle the contribution of hybrid learning components.