PT. BAS is one of the companies who provides services in Indonesia. According to an interview with Human Capital Management, the company still receives complaints from their employees regarding their job satisfaction. After conducting an assessment, it was found that the problem lies in the lack of job description understanding and the suitability of job specifications from the employees in the company. Seeing this condition, a hypothesis emerges which assumes that both of these things have a relationship with PT. BAS’s employee job satisfaction. Through this research, it is hoped that the relationship can be found so PT. BAS can get some consideration material on their human resource management. To achieve this goal, multiple linear regression analysis methods were used to determine the relationship partially and simultaneously and descriptive statistical methods were used to determine the condition of the three research variables and to add information for the company's consideration. From the results of descriptive statistics, it was found that the three research variables at PT. BAS is not reaching the company's target, namely Good and Very Good. Then from the processing of multiple linear regression analysis, it was found that there is a relationship between job description understanding and job specification suitability simultaneously with job satisfaction, but only job specification suitability that has a partial effect on job satisfaction. As for the ability of the two independent variables in explaining job satisfaction of PT. Simultaneous BAS is 69.3%.