The study explores how different occupational backgrounds of Master’s students in LIS shape their motivation to choose a career in the library profession. The research is conducted on full-time employed Master’s students from Hong Kong. The research method applied is survey, and data were collected with an online questionnaire. The study reveals that students with library jobs significantly differ from students employed elsewhere with respect to motivation to pursue a career in LIS. While library-employed students place more value on extrinsic motivating factors, students employed in other fields value intrinsic factors as well. Regarding the future developments in the LIS profession, students from both groups agree that the application of information technologies, service orientation, academic research, marketing activities and teaching are all important.