The companies interested to improve the work performance of employees in achieving organizational goals. There are various factors that affect employee work performance, which in this study limited to the three factors, namely organizational climate, employee commitment and job satisfaction. Employee commitment is also influenced by various factors, including work tenure, personal characteristics, and work environment. The formulation of problem in this research is how the influence of organizational climate, employee commitment and job satisfaction on employee work performance at PT. XL Axiata Medan, and how the influence of work tenure, personal characteristics, and work environment to the commitment of employees at PT. XL Axiata. The objective of this research is to investigate and analyze the influence of organizational climate, commitment, and job satisfaction on work performance of employees, and to identify and analyze the influence of work tenure, personal characteristics, and work environment to the commitment of employees at PT. XL Axiata.The applied theory is a human resource management, particularly related to work performance, organizational climate, employee commitment and job satisfaction.The research method is a survey approach, the nature of this research is explanatory, and descriptive quantitative research. The data was a collected by interview, questionaire and documentation study. The sample in this research are 80 employees. The variables measured by Likert scale. The hypothesis is tested using Chi-square analysis and multiple linear regression analysis through F test and t test.Simultaneously organizational climate, employee commitment and job satisfaction have a significant effect on work performance of employees in PT. XL Axiata Medan, with a coefficient of determination (R2) equal 0.484. Partially, that each variable organizational climate, employee commitment and job satisfaction have a significant effect on work performance of employees in PT. XL Axiata Medan. The employee commitment variable is more dominant influence on employee job performance at PT. XL Axiata Medan.The results of analysis showed that the simultaneously working lives, personal characteristics, and work environment variables have a significant effect on the commitment of employees at PT. XL Axiata Medan, with determination coefficient equal 34.6%. Partially, it is known that the work tenure, personal characteristics, and work environment variables have a significant effect on the commitment of employees at PT. XL Axiata Medan. The work environment variable is more dominant influence on the commitment of employees at PT. XL Axiata Medan.
