This study aims to analyze the implementation of employee codes of ethics in human resource management at PT Kereta Api Indonesia (Persero) (KAI) through a literature review. Employee codes of ethics serve as guidelines for establishing professional behavior, maintaining integrity, ensuring accountability, and supporting the effective management of human resources. In a company operating in the railway transportation sector, the implementation of ethical standards is particularly important for promoting employee discipline, responsibility, fairness, and compliance with organizational regulations. This study uses a literature review method by examining relevant academic publications and official company documents related to employee codes of ethics, human resource management, business ethics, ethical leadership, organizational ethical culture, corporate governance, and whistleblowing systems. The analysis focuses on the role of codes of ethics in supporting human resource management practices, including employee development, supervision, performance evaluation, and the prevention and handling of ethical violations. The literature reviewed indicates that effective implementation requires more than the formal establishment of ethical regulations. It also depends on consistent leadership, clear communication of ethical standards, continuous employee training, fair enforcement of rules, and accessible reporting mechanisms. In the context of KAI, corporate governance policies and the whistleblowing system provide institutional mechanisms that can support transparency, accountability, and the reporting of suspected violations. These mechanisms may contribute to the development of an ethical organizational culture when integrated with human resource management practices. However, because this study relies on a literature review, it does not directly establish the effectiveness of KAI’s code of ethics in changing employee behavior or reducing ethical violations. The study concludes that integrating employee codes of ethics into human resource management is essential for promoting professional conduct, strengthening employee accountability, and supporting sustainable organizational performance. Therefore, consistent implementation, evaluation, and internalization of ethical values are necessary to ensure that the code of ethics functions not merely as a formal regulation but also as an integral part of organizational culture.
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