Oluwatosin Abiodun OLOGBOSERE2024-07-012024-07-012023-12Kate TurabianPh.Dhttps://repository.lcu.edu.ng/handle/123456789/629The performance of mobile telecommunication companies using 4G operation services suggest that challenges exist, hence for this study. The study examined the influence of information security practices and organizational agility of information managers’ service performance in mobile telecommunication companies in South-west Nigeria. Mixed method research design was adopted and the population of the study comprised information managers and subscribers of four mobile telecommunication companies. Multi-stage sampling technique was adopted with strata techniques to select a sample of 384 subscribers and 210 employees of the four mobile telecommunication companies. The research instruments were structured questionnaire and an interview guide. The data collected was analysed using both quantitative and qualitative methods. Descriptive and inferential statistics were used to analyze the quantitative data while thematic analysis was used for the interview responses. The results showed that the level of information managers’ service performance in the four mobile telecommunication companies is high. Level of information security practices and organizational agility of these companies were found to be moderately high. The test of hypotheses revealed that information security practices (R=0.380; Adj R2 = 0.131; p<0.05) and organizational agility (R=0.342; Adj R2 = 0.096, p<0.05) have significant influence with the information managers service performance. The multiple regression analysis showed that the combined influence on information security practices and organizational agility influence the information managers’ service performance (R=0.278; Adj R2 = 0.0063, p<0.05). Individually, information security practices contribute (t=2.104, p<0.05) or 21.04%; while organizational agility contribute (t=2.210, p<0.05) or 22.1% to service performance. The study, therefore, concluded that both information security practices and organizational agility are essential to service performance of the companies. It was also recommended among others that training, creativity and policy adherence be encouraged by the management in Nigerian Telecommunication Companies. Keywords: Information Managers, Information Security Practice, Organisational Agility, Service Performance Word Count: 287enInformation ManagersInformation Security PracticeOrganisational AgilityService PerformanceThesis