Dr. McMahon's research focuses on adverse childhood experiences (ACEs) and the design and implementation of multi-level interventions aimed at reducing lifetime disease risk and population-level health disparities associated with trauma and environmental stress in childhood. She implements community-engaged strategies throughout the research process, including the early involvement of Community Advisory Boards, to maximize cultural appropriateness and fit, effectiveness, sustainability, and scalability of health behavior interventions in children at disproportionate risk of ACEs-related disease.