BackgroundIn Australia, lived experience peer support workforces are expanding making it one of the fastest growing emerging disciplines in transdisciplinary mental health settings. This article provides insight for organisations on the contextual realities peer workers face, increases understanding of peer support services to improve service delivery environments and contributes to mental health systems reform. This study aimed to qualitatively explore peer support workers experience integrating into and working within transdisciplinary mental health service teams.MethodSemi-structured interviews were undertaken with 18 peer support workers currently working in mental health services in Australia. The research was a qualitative descriptive study design. All data collected were analysed utilising thematic analysis.ResultsPeer workers found their experience in the workplace was influenced by their colleagues and the organisation’s understanding of the peer role. Factors relating to organisational culture and climate were a central theme throughout discussions noting that a negative climate was perceived as harmful to peer workers. Themes established through results include (1) the role of leadership, (2) attitudes and behaviours of colleagues, (3) provision of psychologically safe environments, (4) the organisations messaging and use of language and (5) organisational structures and policy.ConclusionThis study contributes to evidence for the impact of organisational culture on integrating and supporting peer support workers in mental health service delivery. This study provides insights into peer worker experiences integrating into transdisciplinary teams, confirming findings established in previous studies, highlighting a lack of movement or change in workplace culture to support peer worker integration into mental healthcare settings.