Fast-Track Cities is a global partnership between cities and municipalities around the world and four core partners, including IAPAC. Launched in December 2014, the partnership has grown to more than 550 cities and municipalities that have committed to accelerate their local HIV, tuberculosis (TB), and viral hepatitis (HBV and HCV) responses to achieve Sustainable Development Goal (SDG) 3.3 by 2030. IAPAC is delivering technical assistance to and engaging in direct interventions across the Fast-Track Cities network. Advanced collaboratively with local stakeholders, our work includes data generation/monitoring, implementation planning, capacity-building, community engagement, stigma elimination, and quality of care and life assessments.