Different personalities and management style affect the performance of the employee. The study aims to investigate the impact of personality traits on the job performance. The five personality traits are self-esteem, openness to experience, extraversion and emotional stability. The study also explores the relationship between paternalistic management style and the job performance. A purposive sample of 199 respondents from telecommunication Sector of Pakistan is selected for the study. The result reveals that personality traits of extraversion, optimism and emotional stability and management style of paternalistic approach positively and significantly relates to employee’s job performance.