This study examined the impact of workplace politics on employee morale among non-academic staff in selected tertiary institutions in Enugu State, Nigeria. Specifically, it assessed the effects of competition for control of resources on employee satisfaction, the influence of personality differences on staff collaboration, and the consequences of unclear leadership roles on decision-making processes. The study population comprised 2,327 non-academic staff across four institutions, from which a sample of 146 respondents was drawn using Taro Yamane’s formula and proportional allocation. Primary data were collected via a structured questionnaire, achieving a 99.3% response rate. Data analysis involved descriptive statistics, correlation analysis, and structural equation modeling (SEM) using SPSS and AMOS. Results indicated that competition for control of resources negatively affected employee satisfaction (β = -0.623, p < 0.001), personality differences undermined staff collaboration (β = -0.567, p < 0.001), and unclear leadership roles exerted the strongest negative effect on decision-making (β = -0.712, p < 0.001). Overall, workplace politics significantly reduced employee morale (β = -0.687, p < 0.001). The study concludes that workplace politics diminishes morale by fostering competition, conflict, and leadership ambiguity. Recommendations include implementing transparent resource allocation systems, introducing conflict management programs to address personality differences, and clarifying leadership structures to enhance decision-making and overall morale.