PurposeThe main goal of the article is to identify, analyze and evaluate the mediating role of HRM outcomes in the relationships between employee retention (ER) and company performance results, with a specific focus on discerning any shifts or differences in this mediation across non-crisis and crisis times in the foreign subsidiaries of MNCs.Design/methodology/approachThe empirical research covered 200 MNCs headquartered in Central Europe. A Computer-Aided Telephone Interviewing (CATI) method was used for data collection. The raw data was adjusted using the Efficiency Index (EI) to accurately represent the relationships between the variables under study. The research hypotheses were examined, and the mediating effects were assessed through Partial Least Squares Structural Equation Modeling (PLS-SEM).FindingsThe research findings provide valuable insights by exploring the mediating role of HRM outcomes between ER and company performance results, highlighting HRM’s crucial role in enhancing results in finance, innovation and quality, particularly during crises. They underscore the strategic importance of HRM in fostering organizational resilience and innovation.Originality/valueThe study offers a new methodological contribution through introducing the EI for a precise quantitative evaluation of the relationships between ER, HRM and company performance results. However, the greatest added value of this article is the creation of the ER-HRM Mediation Theory of Organizational Resilience through Innovativeness in Crisis.