Evidence has shown that Multisystemic Therapy (MST) an intensive family- and community-based intervention has been particularly effective in the treatment of youth with antisocial behaviour from ethnically diverse backgrounds. Although the process of change within MST has been explored, there is a dearth of research in looking at this for families from ethnic minority backgrounds. The current research aimed to address this gap by exploring the experiences of a sample of London based caregivers who had completed an MST intervention. A qualitative approach was adopted, using grounded theory methodology to explore ethnic minority caregiver experiences of MST and generate a model of the processes of engagement and change based on participants' accounts. Seven semi-structured interviews were carried out with caregivers from two London sites. The emergent model consisted of seven interacting theoretical codes. Three of these codes were organised around the process of engagement; deciding to engage with MST, becoming therapeutically aligned and considering cultural difference, and four related to the process of change; working within a safe and trusting relationship, therapist acting as cultural broker, empowering the parent and increased communication within and outside the family. The author makes novel suggestions relating to the specific mechanisms that are thought to underlie the process of engaging with MST, and highlights the importance of considering cultural difference in the initial stages of the MST intervention.