Job satisfaction is an employee's happiness towards their job at work. It represents one of the most complex areas managers face today when managing their employees. Many studies have shown that job satisfaction can have an impact on employees. Therefore, this study aims to investigate the relationship between job satisfaction and its three variables, which are remuneration, working environment, and promotion opportunities, among SEDIA employees in Sabah. A case study and quantitative approach were used to conduct this study. The data were collected from a sample of 95 respondents from all levels, and the data collection was done through survey questionnaires using Google Forms as a platform. The study used SPSS and SmartPLS software to analyse the data. Descriptive statistics were used to analyse the demographic profile of the respondents, and SmartPLS were used to check and test the relationship between the dependent and independent variables. The study's findings show that two of the three hypotheses have a positive relationship with job satisfaction, namely remuneration and working environment, with a probability value of p < 0.01. In comparison, the promotion opportunities show less significance on job satisfaction with a probability value of p > 0.01. These findings could be useful as a basis for Human Resources to make decisions about employee welfare, formulate retention strategies, and future planning and development.