This paper presents part of theoretical and practical analysis of the influence of Arab Islamic culture on employees' effectiveness in Jordanian commercial banks. It considers two of the Islamic values: Intention (Neyyah) and Justice Trust (Amana) from the employees' perspective. The influence of religion on both: practices of management and its role in human behaviour within work organizations has been ignored (Ababneh & Avramenko, 2016). This paper tries to fill part of this gap by considering its influence on organizational performance in general and employee's effectiveness in particular.