Manufacturers migrate their processes to Industry 4.0 that includes new technologies for improving productivity and efficiency of operations. One of the issues is capturing, recreating, and documenting the tacit knowledge of the aging workers. However, there are no systematic procedures to incorporate this knowledge into Enterprise Resource Planning systems for maintaining a competitive advantage. This paper describes a solution proposal for a tacit knowledge elici-tation process for capturing operational best practices of experienced workers in industrial domains for on-site training. We use Concept Maps mining and domain ontologies to discover and integrate information into a Knowledge Graph in a role game played by human and virtual agents. Ethical and societal concerns are discussed as well.