BackgroundSecurity guards (SGs) play a significant role in health care and are an integral part of many psychiatric institutions. While their main duty is to ensure service users’ (SUs) and staff's safety and protect the premises, they are also called upon for other tasks, often ones for which they are not adequately trained. This study aimed to explore the roles, formal and informal tasks performed, working conditions and well-being of SGs working in psychiatric services. MethodsGuided interviews were conducted with n = 12 SGs and n = 18 mental healthcare providers (MHCPs) at a psychiatric hospital in the Western Cape of South Africa. All interviews were audio recorded, transcribed verbatim and analyzed using a thematic analysis approach. ResultsIn addition to ensuring safety, SGs take on numerous informal tasks, often for which they are not adequately trained and which formally fall under the purview of other MHCPs, mostly nurses, including talking with SUs about their mental health issues, dressing, showering, feeding, and administering medication. SGs also serve informally as interpreters, raising ethical concerns regarding accuracy and confidentiality. SGs lack formal training for working in psychiatric services and handling aggressive SUs, which may lead to increased violence instead of de-escalation and, in the worst case, injuries. SGs work under precarious working conditions (i.e. low salary, outsourced employment, absence of labour rights and job insecurity) and lack professional recognition, potentially leading to lower job satisfaction and increased emotional distress. ConclusionAddressing the challenges outlined in the study requires collaborative efforts between government, psychiatric institutions, private security companies, SGs and MHCPs. The establishment of clear roles, implementation of comprehensive formal training, psychosocial support and improved working conditions, particularly in-house employment, higher pay, increased employee rights and job security, are needed.