There are a multitude of stakeholders involved in the protection, education, mental health and psychosocial care of children for children in low- and middle-income countries. This article presents how the current medical and public health models for child mental healthcare, do not adequately address the complexities of child protection and mental health. It argues for mental health professionals to: (a) recognise the role of Adverse Childhood Experiences (ACEs) in mental health morbidity; (b) adopt an alternative approach, namely that of transdisciplinarity, to enable more effective solutions to children’s psychosocial and mental health issues, through systemic reform and transformation.