PT Complus Sistem Solusi (PT CSS) is an information technology equipment provider in the field of system integrators and other information technology solution providers. The purpose of the study: to analyze the influence of Employee Competence and Commitment in PT CSS in an effort to improve Employee Performance by mediating Organizational Citizenship Behavior (OCB). Research method: using the Structural Equation Modelling method based on Partial Least Square (SEM-PLS) with the SmartPLS data processing program. The results of the study: (1) Employee competence has a significant positive effect on employee performance, (2) Employee commitment has a negative and insignificant effect on employee performance, (3) OCB has a significant positive effect on employee performance, (4) Employee competence has a significant positive effect on OCB, (5) Employee commitment has a significant positive effect on OCB, (6) Employee competence has a significant positive effect on employee performance through OCB, (7) Employee commitment has a significant positive effect on Employee Performance through OCB.