Jewel Journal of Librarianship ISSN: 2141-3908 (Print); ISSN: 2736-0881 (Online) Volume 17, Issue 2; Published: June, 2022 https://www.jeweljournals.com Nigerian Library Association, Gombe State Chapter 1 Motivation, Mentoring, and Job Satisfaction of Library Personnel in university libraries in Osun State, Nigeria Godwin Lucky Stephen Tekena Tamuno Library, Redeemer’s University Email: godwins@run.edu.ng Adeniran Pauline Oghenekaro Tekena Tamuno Library, Redeemer’s University Email: adeniranp@run.edu.ng Unuigboje Benedette Ogoo Tekena Tamuno Library, Redeemer’s University Email: unuigbojeb@run.edu.ng Abstract Design/methodology/approach – The study adopted the survey research design. A validated structured questionnaire was used as the instrument of data collection for this study. A total of 140 copies of the questionnaire were administered to library personnel in university libraries in Osun State, Nigeria. A total of 120 participants responded and completed the survey questionnaire giving a response rate of 85.7%. The research questions were done using descriptive statistics. The hypotheses were tested using linear, and multiple regression analysis. The formulated hypotheses were tested at 0.05 levels of significance. The Statistical Package for the Social Sciences (SPSS) version 24.0 was used to analyze the data. Findings – The results indicate that motivation significantly influences job satisfaction of library personnel in university libraries in Osun State, Nigeria. The result also shows that mentoring significantly affects the job satisfaction of library personnel in university libraries in Osun State, Nigeria. Furthermore, the results indicate that Motivation and mentoring jointly significantly influenced job satisfaction of library personnel in university libraries in Osun State, Nigeria. Keywords - Job satisfaction, Motivation, Mentoring, Librarians, Library personnel, Nigeria Introduction Job is critical in the lives of people of all ages. Their lifestyle and living both socially and otherwise depend on their jobs. Hence, it is essential for them to experience satisfaction in whatever organization they have chosen to work. Satisfaction is the pleasure individuals feel when their needs are fulfilled. Simply put, an individual is satisfied when their expectations, desires, or requirements have been met. Job satisfaction is the sense of fulfilment and pride felt by people who enjoy their work and do it well. It describes how much they are pleased, comfortable, or satisfied with their job. Singh and Jain (2013) defined job satisfaction as the positive and negative feelings of an employee towards his job or is the amount of happiness connected with the job. Kasemsap (2017) sees job satisfaction as the sense of inner fulfilment and pride achieved when performing a particular job. Job satisfaction produces a positive ambience and is critical for organizations' success. Yee, Guo, and Yeung (2015) opined that satisfied employees would have more time to transfer their positive emotions to the customers toward improving organizational profits. In modern organizations, job satisfaction effectively leads to productivity, reduced job stress, and decreased employee turnover. When employees are satisfied with their jobs, they will