Community Engagement and Dissemination Core Abstract The Community Engagement and Dissemination Core (CEDC) plays a pivotal role in the PATC3H-IN network by emphasizing community engagement and research dissemination as essential components of its mission. This core defines community engagement as a dynamic, two-way exchange between researchers and various key communities of interest within the six PATC3H-IN countries, encompassing adolescents and young adults (AYA) living with or at risk for HIV, AYA researchers, family members (especially guardians) and friends of AYA, HIV care providers, implementers, community members, and policy-makers. Building on a strong commitment to enhancing the dissemination of AYA HIV research in low- and middle-income countries (LMICs), the CEDC has a track record of successful participatory crowdsourcing activities aimed at promoting AYA inclusion in HIV research. These initiatives involve collaborative problem-solving and sharing solutions with the community, demonstrating the capacity to effectively engage AYA and disseminate research findings through creative means such as infographics and short videos. The CEDC's overarching goal is to disseminate evidence-based HIV interventions, research findings, guidelines, and programs to combat the HIV epidemic among AYA using community-engaged participatory strategies. To achieve this, they propose three specific aims. Aim 1 focuses on community engagement in network leadership. The CEDC plans to determine engagement and dissemination plans for the PATC3H-IN network through crowdsourcing and a modified Delphi method. The results of this process will lead to the development of a consensus statement on engagement and dissemination strategies, with a focus on adaptability, scale-up, and sustainability. Aim 2 centers on outreach and training for communities. The CEDC aims to create a network-wide platform for training communities, including PATC3H-IN researchers and AYA, in engagement and dissemination strategies. This involves the development of tailored training modules, a practical guide, videos, support for social media, and a consultation service. The training will leverage existing strengths within the network using appreciative inquiry. Aim 3 involves the translation of science to service. The CEDC will evaluate community engagement and dissemination strategies, tracking metrics and monitoring dissemination. Case studies will be guided by the Translational Science Benefits Model, and a dissemination summit will provide a platform to celebrate successes. The CEDC will establish the infrastructure needed to develop and maintain community- driven engagement and dissemination plans for the PATC3H-IN network, enhancing the capacities of network researchers to meet the needs of local communities for outreach and dissemination. The CEDC will contribute unique value to community engagement and dissemination, ultimately helping to address the HIV epidemic among AYA in LMICs.