In the oil and gas industry, ensuring the safety of personnel working in electrical environments is a top priority. Arc flash incidents pose significant risks to workers, potentially resulting in severe injuries or fatalities. This paper presents a comprehensive case study of an arc flash risk assessment for a substation in Plant X, Malaysia that includes 11 kV and 415 V switchgear. Utilizing industry-standard guidelines such as IEEE 1584 and NFPA 70E, alongside advanced simulation software, ETAP, the study aims to evaluate and mitigate arc flash hazards efficiently by determining hazard levels, incident energy, and arc flash boundaries. To ensure compliance with safety standards, the appropriate level of personal protective equipment (PPE) is recommended. By enhancing understanding and awareness of arc flash hazards and mitigation strategies, this research contributes to the ongoing efforts to improve safety standards in the oil and gas industry.