The Impact of Big Five Personality on Executive Employees’ Job Performance: Mediating Role of Job Satisfaction in a Selected Public Financial Institution in Sri Lanka

The impact of an individual's Big Five Personality (BFP) on Job Performance (JP) is an important concept that has received widespread attention in the contemporary world. This study investigates the impact of an executive employee’s big five personality on job performance, with Job Satisfaction (JS) as the mediating factor for executive employees in a selected public financial institution in Sri Lanka. This study employs trait theory and a Five-Factor Model, analyzing individuals through a self-administered questionnaire utilizing a natural setting. The questionnaire comprises 75 statements and a demographic profile as the measurement instrument. Thirty executives were the subjects of the pilot test. 150 executives from the chosen public-sector financial institution made up the sample size. The data was analyzed using regression analysis and the correlation coefficient technique, with statistical data analysis conducted using SPSS 26. The study revealed that the big five personality and job satisfaction significantly influence executive employees' job performance and confirmed the mediation effect of job satisfaction. This study supports the big five personality and job satisfaction effects on job performance, offering insights for future human resources management planning such as recruitment, deployment, capacity development, and performance reviews in both the public and private sectors. Longitudinal and subsequent studies using alternative data collection techniques like interviews, samples, and mixed methods are recommended for more in-depth and diverse findings. Keywords: Big Five Personality, Executive Employees, Job Performance, Job Satisfaction, Public Sector, Sri Lanka