The aim of this study is to examine Human Resource Management, its practices, perceived organizational support and employee outcomes in International and English Program schools in Central Thailand. A survey questionnaire was answered by 153 administrators and teachers who participated in this study and examined the levels of HRM and Quality Assurance and their relationship with each other. Besides this, Quality Assurance in Thailand in the respective schools included was discussed using secondary data from the Office of the National Education Standards and Quality Assessments (ONESQA) third round cycle of external assessment. Results showed younger employees view of Human Resource Management significantly differed from their older colleagues. It was also found that Human Resource Management is not a determinant in Teacher Performance. The Quality Assurance of schools included was found to be at a good level. Results also showed that there is a weakly positive correlation between Human Resource Management and Quality Assurance which is not significant. An intervention program was recommended to increase the level of HRM practices and Quality Assurance of schools in Central Thailand.