This study seeks to examine the predictive capability and effect of administrative creativity on improving employees’ job performance in public institutions, while investigating the potential mediating roles of motivation and job satisfaction. The research problem stems from the field observation that many Libyan public institutions, despite their theoretical recognition of the value of creativity, struggle to translate it into effective institutional practices that make a tangible difference in employee performance. The study adopted a descriptive-analytical approach and administered a questionnaire comprising 20 items distributed across four dimensions: administrative creativity, motivation, job satisfaction, and job performance. The questionnaire was administered to a limited sample of 65 employees working at the Social Security Fund – Derna Branch, selected via simple random sampling, noting that this sample size constitutes a methodological limitation regarding generalizability. Data were analyzed using SPSS and PROCESS Macro. The results indicated that the study dimensions were perceived by respondents at high levels, with arithmetic means ranging from 4.615 to 4.669. The first hypothesis test revealed a statistically significant effect of administrative creativity on job performance (β = 0.729, R² = 0.424, p < 0.05). The second hypothesis (partially accepted) revealed a statistically significant correlation between administrative creativity and motivation (r = 0.455, p < 0.05), whereas no statistically significant relationship was found with job satisfaction (r = 0.015, p > 0.05). Mediation analysis (PROCESS Macro) further revealed a statistically significant indirect effect of administrative creativity on job performance through motivation (indirect effect = 0.214, 95% CI [0.108, 0.334]), whereas the indirect effect through job satisfaction was not statistically significant (indirect effect = 0.038, 95% CI [-0.035, 0.112]).................... Keywords:............. Administrative Creativity, Job Performance, Employee Motivation, Job Satisfaction, Public Institutions.