OHS is an activities to ensure and protect the safety and health of the workforce through prevention of occupational injuries and occupational diseases. One way of prevention of work accident is through to implement OHS System. The OHS process should begin with a good planning process to ensure that its implementation complies with the desired policies and objectives. PT. XYZ Medan has implemented OHS System which is regulated in the procedures and manuals of the company’s management system. The purpose of this study was to assess and evaluate the Occupational Safety and Health Management System and also to evaluate Hazard Identification in the company. This research uses checklist method of all assessment criteria of OHS management system based on Indonesian Government Regulation, and for application of OHS in company use qualitative data through spreading of quisioner to managers, supervisors and workers. Based on the result of observation, it is found that the implementation of OHS in the company is not fully complied with the Indonesian Government Regulation. There are still 24 unfulfilled criteria that is concerning policy, plan of OHS, document control, product control, work security, hazard inspection, material management, skills and abilities. This study resulted in the acquisition of the results of analysis in the achievement level of OHS is 92.2% and has been included in the satisfactory category so worthy to be certified and ranked the golden flag. And analysis of the implementation and implementation of OHS to the established principles has been above 50% and can be interpreted that OHS is considered important to be applied in the company.