Abstract Human resources are the most important asset in an organization in encouraging the achievement of goals, so that human resources themselves become a necessity and need that an organization must have. Human resources really determine the process of successful performance of an organization which needs to be utilized and developed. With the support of large potential resources, an organization can operate effectively and efficiently which comes from the support of employee roles. Employees who work have the right to work safety and health which in practice is protected by statutory regulations. However, in reality, the number of work accidents, especially in Indonesia, is still relatively high and increasing. This literature exploration aims to formulate hypotheses related to the impact of occupational health and safety, competency and work environment on worker performance in an organization. The focus of this literature exploration lies in aspects of human resource management, the importance of K3, competency development and training in improving worker performance which will contribute to company productivity in achieving organizational goals. Keywords: Development and Training, Occupational Health and Safety, Human Resources Performance