The relationship between personality and job performance is well-established, but research on university non-academic staff is scant. The Big Five Personality Traits Model (BFPTM) and job performance (task and contextual) were examined in this paper. Multiple linear regression was used to test hypotheses on a convenience sample of 254 non-academic staff respondents from two South-western Nigerian universities. Findings revealed that conscientiousness, agreeableness, neuroticism and openness to new experiences significantly influenced task performance, but not extraversion. Extraversion, agreeableness, neuroticism and openness to new experiences significantly impacted contextual performance, but not conscientiousness. Overall, openness to new experiences influenced task performance the most, while neuroticism influenced contextual performance maximally. Based on the findings of this study, university administrators can better understand how personality factors affect task and context performance. The findings of this study can be used to guide non-academic staff recruitment, selection, retention, promotion, and motivation.
Keywords: Job performance; Non-academic; Nigeria; Universities; Personality traits.