Final year librarianship students at a South African University are required to do a six months work integrated learning (WIL) programme in a real workplace environment. The purpose of the WIL is to put theory into practice so that the students can gain workplace experience. To gain experience, students are assigned mentors who teach them the job hands-on. During that process it is assumed that tacit knowledge is transferred from the mentors to the students. Tacit knowledge transfer has been a matter of intense debate in the knowledge management field. The purpose of the study was to investigate whether tacit knowledge is transferable from professional mentors in industry and students doing WIL. Further to that, the study sought to investigate if there are tacit knowledge transfer barriers that students face when they are doing their WIL. A qualitative case study was adopted. The case is a department in a South African University. Content analysis was used to analyse students’ WIL reports. 120 reports collected over a period of four years were analysed. Studies on knowledge transfer in internship programmes have been conducted and revealed many results. This study is unique in that it focused on a different context. Results reveal that tacit knowledge is transferred from mentors to students. This is because after WIL, students gain cognitive (ability to take job related decisions) and technical skills (ability to perform job related functions). The major barriers to tacit knowledge transfer are insufficient time for WIL, unwillingness of mentors to teach students and a slow absorptive capacity rate of students. This study has revealed that tacit knowledge is transferable although there are barriers to its transfer. The results inform organisations and Universities about the current WIL situation and suggests ways to improve the current situation. Institutions will have to find ways to eliminate the barriers to facilitate the successful transfer of knowledge so that students fully benefit from WIL programmes.