This article researched the influence of personality, as well as with the Big Five personality traits – extraversion, agreeableness, conscientiousness, neuroticism, and openness to experiences – on work performance in terms of behavior and results, in this case, at PT Jamsostek region of Central Java and DI Yogyakarta region using 186 subjects. The results showed a positive influence of extraversion and agreeableness on job performance and behavior. Neuroticism negatively affected results, and openness to experiences affected behavior positively. Measurement results have met the criteria for goodness of fit, among others, indicated by the value of the chi-square = 4.274; probability = 0.233; GFI = 0.992; AGFI = 0.878; TLI = 0.996; CFI = 0.955; RMSEA = 0.061; CMIN/Df = 1.425, besides the results of the regression coefficients that describe the influence on performance behavior on work of –0.17. Based on that account, the account officer must provide good service to customers at all times.