Purpose-The study, rooted in Social Exchange theory, aims to examine the relationship between diversity climate and loyal behavior within the context of human resources management. Furthermore, it seeks to analyze the mediating role of job passion in this relationship. The primary objective of this research is to understand the connection between diversity climate and loyal behavior while shedding light on the role of job passion as a mediator in this relationship. By employing two distinct methods, this study aims to comprehensively explore the interplay of these factors in the organizational context.Design/Methodology/Approach-The research was meticulously designed and conducted through two primary approaches. In the first phase, quantitative data was gathered using a comprehensive questionnaire, amassing responses from a total of 312 participantsin the industrial field. For the second phase, a qualitative methodology was employed, involving face-to-face interviews conducted with 91 selected participants. This mixed-method approach enables a robust exploration of the dynamics between diversity climate, job passion, and loyal behavior.Results-The outcomes of both quantitative and qualitative investigations concur, revealing a notable impact of diversity climate on loyal behavior among employees. This impact manifests itself consistently and significantly across both studies, underlining the significance of diversity climate as a predictor of employee loyalty. Additionally, the research uncovers the moderating role of job passion in this equation, indicating that the degree of passion for a job can influence the strength of the relationship between diversity climate and loyal behavior.Discussion-The findings of this study not only confirm the previously hypothesized relationship between diversity climate and loyal behavior but also provide deeper insights into the underlying mechanisms. The observed interaction of job passion as a moderating factor adds an extra layer of complexity to the understanding of this relationship. Notably, the nuanced analysis of different sub-dimensions of job passion reveals contrasting impacts; while harmonious passion mitigates the relationship between diversity climate and loyal behavior, obsessive passion exacerbates this relationship. These findings underscore the intricate nature of employee engagement and loyalty within the context of diverse workplaces, emphasizing the need for a holistic approach to managing workforce diversity in human resources management.