ABC Inc. is a company infield of total services for the palm oil mill industry, as a supplier of various instruments and equipment for factories and receives repair services for various palm oil mill instrumentations, such as boilers, hydraulic systems, heavy equipment, and generator sets. The company itself has been implemented and has been certified for ISO 45001: 2018. The purpose of this research was to identify how the impact of ISO 45001: 2018 implementation on the employees of. ABC Inc. in the technical operations division. Then, the fishbone diagram analysis method was used in this research to determine whether the process had been within the limits of statistical control and had been within the limits of specification or tolerance. In conclusion, there were obstacles to fulfilling the Occupational Health and Safety Management System (OHSMS) Process clause such as workers who did not fully have an awareness of the importance of running the company's OHSMS, lack of manpower in the HSQ/ISO department, and had not fully identified incidents, non-conformity and corrective actions for several company environments. Keywords: ISO 45001: 2018, OHSMS, Performance Analysis, Company, Employee