The Social Security Administrative Agency for Health (BPJS Health Agency),is a public state corporation, launched by the government to manage the Health Insurance program for all Indonesian people, is until now, in the midst covering the health care for millions of people in Indonesia, sadly facing financial deficit every year.And it causes BPJS Health Agency to receive sharp scrutiny from all parties, starting with the government, hospitals, and the people of Indonesia. This attracted the attention of the writer to attempt a research on how the performance of BPJS Health Agency employees is, in its conditionwith financial deficit each year,what factors that influence the performance of BPJS Health Agency employees,and last,writer also interested in analysing the differences in employee performances based on age and gender using the PLS Multi-Group Analysis (MGA) method. The quantitative method that is used in this studyis being applied with 156 BPJS Healt Agency employees as respondents.The result of the research presents following findings such as; Transformational Leadership has a direct positive effect on Good Corporate Governance; Organizational Culture has a direct positive effect on Good Corporate Governance, and Good Corporate Governance has a direct positive effect on Employee Performance, also Organizational Commitment as a moderate variablegives the effect of Good Corporate Governance on Employee Performance as positive and significant.While the result of MGA analysis based on age,is that, there is no significant difference in the coefficient of the effect of Good Corporate Governance on Good Employee Performance between the age 30 year and under (<= 30 THN) and those whom over 30 years (>30 THN). The following result of the MGA analysis based on gender is; there is a significant difference in the coefficient of the effect of GoodCorporateGovernance on GoodEmployeePerformance (Y) between female and male.