This study examined the efficacy of an evidence based supportive leadership program to address psychosocial hazards identified in an organisational health review of a pastoral care organisation. Participants were employees and volunteers identified as having supervisory or management roles (N = 24; M = 11, F = 13; Age Range = 24 to 68), including the Senior Leadership Team (SLT; n = 7). The supportive leadership program was implemented over a 12-month period with follow-up over another 12-month period. Organisational health was measured through the use of the Health and Safety Executive Indicator Tool (HSE, 2004b) and qualitative interview data at pre-intervention and at 12- and 24-month follow-up. The results of the HSE Tool were compared over time, utilising the comparison benchmarks provided by the HSE (2004b). Results indicated notable improvements in organisational health within the SLT with reductions in risk status at 24-month follow-up across the domains of Control, Managerial Support, Peer Support, Relationships, Role and Change. Supportive leadership is a key predictor in organisational health and burnout, and importance in improving organisational health across managers.