The relationship between workplace well-being, seniority, workplace bullying, and employee performance was explored in the context of the Mangkutana district office. Data was collected through direct surveys and questionnaires distributed to respondents. The impact of these variables on employee performance was assessed using multiple linear regression analysis. The results unveiled significant insights. Firstly, a positive correlation was observed between favorable workplace well-being factors and employee performance. Feeling valued, supported, and satisfied in the work environment was linked to higher motivation and productivity. Interestingly, seniority exhibited an unexpected negative impact on employee performance. Longer-tenured employees might face complacency or adaptability challenges, leading to decreased performance. Furthermore, the research emphasized the detrimental impacts of workplace bullying on employee performance. Instances of bullying led to the emergence of stress, anxiety, and decreased job satisfaction, collectively leading to a decline in overall performance and well-being. In summation, this study accentuates the significance of fostering a positive work environment that places a premium on employee well-being and concurrently deals with matters related to seniority and workplace bullying. By recognizing and mitigating these factors, organizations can enhance employee performance, productivity, and job satisfaction, fostering a healthier and more successful work environment.