There is an urgent need for effective weight management programmes to respond to the high rates of obesity among the Pacific and Māori community. The community based Buttabean Motivation (BBM) organisation provides a suite of healthy body programmes with a Pacific focus. Their ‘mission is to reduce the alarming obesity statistics among Māori and Pasifika people’ through physical exercise programmes, enabling them to follow a healthy and active lifestyle forever. This study aims to evaluate the effectiveness of the BBM programme for sustained health and wellbeing outcomes of its predominantly Pacific and Māori members. The objectives include assessing long-term (up to 3 years) weight loss, clinical outcomes and quality of life for BBM members. Additionally, a systems analysis impact model, revealing the strengths and challenges of delivering a sustained service for the Pacific community will be developed, to find effective programme value and providing the basis for continuous quality improvements.