This dissertation investigates the effect of Third-Party Logistics (3PL) outsourcing on the performance of FMCG companies, with a specific focus on Kerry Group plc. The study begins with an introduction to 3PL outsourcing, its benefits, and its increasing adoption by companies to enhance supply chain management and gain a competitive advantage. The dissertation outlines the aim and objectives, research questions, rationale, and significance of the study, as well as the chapter structure. The literature review explores outbound and inbound logistics, the factors driving 3PL outsourcing, its impact on FMCG companies, and the issues that affect the working environment and employee performance. The research methodology chapter details the research philosophy, design, approach, strategy, data collection methods, sampling, instruments, data analysis techniques, ethical considerations, and limitations of the study. The data analysis chapter presents the findings, while the conclusion and recommendations chapter summarizes the key insights and suggests strategies to resolve issues in 3PL outsourcing for the betterment of employee performance. The study aims to identify the advantages of 3PL outsourcing that influence employee performance and provides a comprehensive analysis of the topic, including factors behind 3PL outsourcing, impact on FMCG companies, and issues affecting the working environment and employee performance, concluding with recommendations for improvement.