This purpose of this study was to assess the proficiency of library and information service (LIS) personnel in Nigeria. The descriptive survey design was adopted for the study. A structured questionnaire was used to gather data from 45 library staff attendees of 2019 workshop held at the Federal University of Lokoja by the NLA (IT) Section. A total of 38 (84% response rate) copies of the questionnaire were retrieved and analysed with frequency, percentage, mean and standard deviation for the study, using SPSS software. The results revealed that librarians and information experts are knowledgeable in areas such as users’ need, information retrieval etc. Library and information service personnel have a high proficiency in ICT skills ( 3.69) and personal attributes ( 4.18). The study concluded that high level of expertise in numerous areas of librarianship possessed by library and information workers and recommended an ongoing professional development and specialized instruction in operating systems and software management.