The study aimed to investigate the mediating role of career decision-making self-efficacy in the connection between personality traits and career choices in undergraduate students, focusing on variations between genders and school types. The population included 10 public and 10 private schools, with a sample of 10 students from each, totaling 200 students selected through simple random sampling. Data were collected via a questionnaire adapted from the Career Decision Making Self-Efficacy Short Form by Betz & Taylor (2012). Results showed slightly higher self-efficacy among male students and those attending private schools. The study suggests a need for structured career development programs in schools, emphasizing the importance of understanding factors influencing career decision-making for effective guidance by administrators and policymakers.