Abstract: This study aims to analyze the effect of work-life balance, knowledge sharing, and job satisfaction on member performance, and identify the most dominant variable. The research location was at Adi Soemarmo Solo Airbase, Central Java. Data analysis techniques using descriptive methods and multiple linear regression analysis. The results showed that work-life balance, knowledge sharing, and job satisfaction significantly influence Adi Soemarmo Solo Airbase member performance. The three variables simultaneously contribute to improving member performance, while partially each variable also shows a significant influence. Work-life balance proved to be the most dominant factor in influencing performance, indicating that balancing work and personal life is important in improving members' productivity and work performance. In addition, knowledge sharing and job satisfaction also contributed significantly to creating a more effective and conducive work environment. These findings confirm that good management of Work work-life balance, as well as an increase in knowledge-sharing culture and job satisfaction, can encourage the optimal performance of members at Adi Soemarmo Solo Airbase. This research is expected to contribute to understanding the influence of work-life balance, knowledge sharing, and job satisfaction on members' Performance at Adi Soemarmo Solo Airbase. The findings emphasize the importance of work balance, knowledge-sharing culture, and a conducive work environment in improving member productivity and performance.