The objective of this research was to reduce the risks associated with the maintenance operations of high-voltage transmission lines, which covers Preventive maintenance (PM), Corrective maintenance (CM), and enhancement of transmission system equipment (Improvement maintenance; IM). Considering that the task involves numerous steps and requires teamwork of approximately 8-12 individuals per operation, any errors in execution could result in injuries, fatalities, or repercussions on the electricity supply, potentially causing widespread power outages. The study was conducted with an emphasis on risk management and Job Safety Analysis (JSA) based on the PEME (People-Equipment-Material-Environment) principle. Then, tasks with medium to high-level risks were further assessed using the Failure Mode and Effect Analysis (FMEA) to identify preventive measures or risk control methods, ensuring that the risks were either prevented or kept within the organization's acceptable range. The results from this research provided insights into risk management practices for high-risk tasks based on risk assessments, facilitating the reduction of losses in human resources, assets, and the electricity production process. This, in turn, reduces the chance of missed opportunities in power distribution within the operational unit. It was also found that a work with a high severity value has a small chance of being conceived. Risk can be decreased to an acceptable level for 19 jobs within the organization. In this regard, there are 7 new procedure manuals and improved operating procedures.The objective of this research was to reduce the risks associated with the maintenance operations of high-voltage transmission lines, which covers Preventive maintenance (PM), Corrective maintenance (CM), and enhancement of transmission system equipment (Improvement maintenance; IM). Considering that the task involves numerous steps and requires teamwork of approximately 8-12 individuals per operation, any errors in execution could result in injuries, fatalities, or repercussions on the electricity supply, potentially causing widespread power outages. The study was conducted with an emphasis on risk management and Job Safety Analysis (JSA) based on the PEME (People-Equipment-Material-Environment) principle. Then, tasks with medium to high-level risks were further assessed using the Failure Mode and Effect Analysis (FMEA) to identify preventive measures or risk control methods, ensuring that the risks were either prevented or kept within the organization's acceptable range. The results from this research provided insights into risk management practices for high-risk tasks based on risk assessments, facilitating the reduction of losses in human resources, assets, and the electricity production process. This, in turn, reduces the chance of missed opportunities in power distribution within the operational unit. It was also found that a work with a high severity value has a small chance of being conceived. Risk can be decreased to an acceptable level for 19 jobs within the organization. In this regard, there are 7 new procedure manuals and improved operating procedures.