This paper presents an analysis of the impact of the Arab Islamic culture self-improvement (Etqan) on employees’ effectiveness in one of the important private sectors, Jordanian commercial banks, with depth from the employees’ perspective. To achieve integration as the key to building noble beliefs and morals based on religious values, spiritual competencies can play a major role (Nasution, 2019). According to Ababneh and Avramenko (2016), it has been largely ignored in work organization the influence of religion on administration practices and its role in human behaviour. This paper tries to shed light by considering its impact on institutional performance and employee’s effectiveness. In a reign as Jordan, religion is a core element in people daily base, as its support from the government. A benefit is a prevalent behaviour inside and outside the work environment (Buthina, Hefin, Brychan, & Caryn, 2020). The question is ’what is the degree of influence of practising religious practices? This study examines the impact of self-improvement (Etqan) on Arab Islamic culture and employees’ effectiveness. This is one of the more critical areas to explore, as it plays a key role in communities and is arguably the most important private sector impacting the economy there. Data were analyzed from employees from five commercial banks in Jordan with a sample size of 174. Therefore, statistical tests were utilized to test the hypotheses of this study. The empirical results of the research show there is a statistically significant effect of Self-Improvement (Etqan) on HR performance in commercial banks in Jordan. Only a few studies focus on validating Western models through Islamic principles. The current study sheds light on the reality of the Western cultural impact on organizations and their apparent adaptation to Western management practices and exploring and reflecting on the impact on organizational performance in general and employees’ effectiveness.