Leo's experience spans 30 years of developing health and community safety services in government, the voluntary and private sector. He has worked strategically in modelling harm costs and improving outcomes for health improvement, serious crime reduction, wellbeing, and safety nationally and internationally.

From General Practitioner Coordinator with the Maudsley NHS Trust, to Head of Drug and Crime Reduction in the Government Office for London; developing Social and Harm Impact financial models with the UK Treasury; to Business Manager for counter-terrorism in the UK Home Office HQ Strategy and International Directorate; Private Secretary (Chief of Staff) within the Home Office HQ and House of Lords; to Group Director of Business Development and Communications for the Social Interest Group,
Leo’s innovative cost of harm modelling and strategic approach, has founded new health approaches, enhanced national security, transformed sustainability paradigms, and led government operations towards national and international delivery.