Employee innovative work behavior is a crucial factor in enhancing academic competitiveness in higher education institutions. This study examines the effects of workplace fun and organizational familiarity on innovative work behavior, with employee antifragility as a mediating variable. A quantitative survey was conducted among 143 permanent lecturers of Prima Indonesia University selected from a population of 712 lecturers using proportional random sampling. Data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM). The results indicate that employee antifragility significantly influences innovative work behavior (b = 0.521; p 0.001). Workplace fun significantly affects employee antifragility (b = 0.412; p 0.001) and innovative work behavior (b = 0.285; p = 0.001). Organizational familiarity also significantly influences employee antifragility (b = 0.398; p 0.001) and innovative work behavior (b = 0.276; p = 0.001). Furthermore, employee antifragility partially mediates the relationship between workplace fun and innovative work behavior (b = 0.215; p 0.001), as well as between organizational familiarity and innovative work behavior (b = 0.207; p 0.001). These findings confirm that both workplace fun and organizational familiarity contribute to innovative work behavior directly and indirectly through employee antifragility.
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