This study investigates the relationship between Intrinsic Factors, Extrinsic Factors, and Turnover intention among middle-level Engineers in the supermarket industry of Sri Lanka, with a focus on the mediating role of Job Satisfaction. A sample of 80 respondents participated in the research, providing data through a questionnaire survey. Utilizing IBM SPSS analysis, the data revealed a significant and positive relationship between both Intrinsic and Extrinsic Factors and Job Satisfaction. Moreover, Job Satisfaction was found to mediate the relationship between Turnover Intention and both Intrinsic and Extrinsic Factors. Specifically, factors such as Pay, Promotion, Coworkers, Job itself, and Supervision were considered when assessing the influence of Intrinsic and Extrinsic Factors on Job Satisfaction. This study contributes to the understanding of the dynamics between organizational factors, Job Satisfaction, and Turnover Intention of engineers in the context of the supermarket sector, offering insights for both academia and industry practitioners.