Objectives. Given the efforts made to incorporate knowledge management into the occupational safety and health management system (OSH-MS), this research attempts to illustrate how the knowledge conversion processes are accomplished within key elements of the OSH-MS. Methods. This study uses concept mapping (CM) as an integrated approach for mirroring participants’ viewpoints about the interaction between tacit and explicit knowledge in the OSH-MS. OSH and knowledge management experts of the National Iranian Oil Company (NIOC) and its subdivisions were invited to complete the CM process. Results. Interpretation of the maps and graphical representations generated indicates that the concepts within the key elements of the OSH-MS are sorted into different clusters, including Knowledge Application, Knowledge Dissemination, Knowledge Socialization and Knowledge Presentation. Regarding the participants’ ratings, the Knowledge Application cluster is rated as the most important, and Knowledge Socialization is rated as the most prevalent. Conversely, Knowledge Presentation is rated the least important and prevalent. Conclusions. The results simulated in MATLAB version R2018a and JMP version 13.2 help in better understanding the interplay between tacit and explicit knowledge in the key elements of the OSH-MS and clarify the potential programmable areas to improve organizational performance.