This paper examines relationships between the Big Five personality factors, time management, and grade-point-average in 556 community colleges students. A path model controlling for vocabulary, gender, and demographic covariates demonstrated that time management mediates the relationship between conscientiousness and students' academic achievement at community college. Separate modeling for part-time ("n" = 147) and full-time students ("n" = 409) showed that this mediation was moderated by enrollment status. Thus, time management was a significant mediator for part-time students but not for full-time students. The greater importance of time management for part- versus full-time students suggests that noncognitive constructs such as time management may be more critical for non-traditional students. These findings gather fresh currency as ever increasing numbers of students are enrolling part-time in post-secondary education across the globe. (Contains 3 figures and 2 tables.)