Existing study was conducted to make a combined examination of the mediating role of (a) Job involvement in linking expanded job scope model (EJSM) with turnover intentions and (b) investigate how the relationship among EJSM and turnover intention is conditional based on the level of Core Self-Evaluation (CSE) in employees.700 questionnaires were circulated among the employees of education and financial sector which yields 490 returns achieving a response rate of 70%. After initial data screening 420 complete responses were available for analyses. The results exhibit that Job involvement (JI) mediates the relationships between EJCM and turnover intentions. The results of the moderated mediation depict that JI mediates the relationships between job scope and high level of CSE in employees. The outcomes delivered valuable understandings for managers and consultants, especially to Human Resource professionals who are trying to facilitate the workforce in challenging working environment through improved job design. The businesses may encourage high level of employee involvement through redesigned job scope in presence of high order personality characteristics which helps to reduce turnover intentions. This paper contributed in the literature of job design in three different ways. First, existing research makes theoretical contribution by adding new dimension in existing JSM which is flexible work time. Second, it describes how dynamic work settings may refine employees’ abilities and behaviors. Third, the research deals with a unique view in research of job design by combining personality as a moderator (i.e., CSE).