Effective and satisfactory security service is critical to private security officers (PSOs) working in the private, state-owned and public sectors as it plays a pivotal role in improving organisational productivity and helps to promote good working relationships. When PSOs project poor attitudes, clients are seriously affected by such negative behaviour and the level of service rendered will eventually deteriorate. This study sought to understand and explore the factors that contributed to unsatisfactory services rendered by PSOs at GPW in Tshwane. The researcher utilised a nonexperimental quantitative research approach and a self-administered questionnaire survey was used to collect data. Data collected was analysed and interpreted using quantitative methods and procedures. The findings emanating from the research revealed that the levels of service rendered by PSOs at GPW in Tshwane was ineffective and unsatisfactory and various factors contributed to ineffective service delivery. Several recommendations are proposed to improve the level of service rendered by PSOs. / Criminology and Security Science / M. Tech. (Security Management)