The purpose of this study was to establish the effects of workplace safety and health practices on the employees’ commitment and performance in Steel manufacturing companies in Rwanda. The target population of this study was 533 people, which comprised of Managers, Supervisors and employees. A simple random sampling technique was used to select a sample size of 229 respondents from the target population. The data was collected using questionnaires, interview guide and personal observation. The Statistical Package for Social Science (SPSS) software, version 21.0, was used to process data while descriptive statistics such as the means, modes, standard deviation, variances and inferential statistics were used to analyze the data. The findings of the study indicate that most workers are aware of the dangers of occupational health and safety in the workplace. Also the study found that although employees are aware of the occupational health and safety concerns they neglect to put on the Personal Protective Equipments saying that it is too hot. The study concludes that occupational health and safety significantly affects employee commitment and performance. This study recommends that management should insure the workers and provide them with personal protective equipments to minimize workplace injuries and accident. The study also recommends that management provide regular education and training on occupational health and safety concerns to prevent workplace injuries, hence, promote productivity.