Climate change and environmental degradation caused by human activities are having an irrefutable impact on human health, particularly mental health. People working in the environment sector are confronted with these impacts daily. This exploratory study was conducted as a response to concern in the sector about rising levels of worry and distress, and a need for organizational knowledge about effective workplace mental health strategies. Using evidenced-based frameworks for workplace mental health and wellbeing, the study focused on the relationship between climate change, environmental degradation and mental health issues for this sector. This Australian-based exploratory qualitative study was guided by participatory research approaches. Maximum variation and criterion sampling strategies were applied to engage environmental sector senior managers (n = 8) in individual/paired interviews, followed by online focus group sessions with frontline employees (n = 9). Qualitative thematic analysis techniques were used in an iterative process, combining inductive and deductive strategies. Data was triangulated and interpretation was finalized with reference to literature and a workplace mental health promotion framework. Interview data provided new perspectives on the interconnectivity between risk and protective factors for mental health. Workers were motivated by commitment and values to continue their work despite experiencing increasing levels of trauma, ecological grief, and stress due to overwork and ecological and climate change crises. The findings highlight the need for integrated health promotion approaches that acknowledge the complex interactions between risk and supportive factors that influence mental health in this sector.