Building a successful open-source project requires more than code; it demands a resilient, self-sustaining global community. While code powers the platform, human connection, trust, and open governance drive long-term ecosystem health and enterprise adoption. This talk explores the blueprint for scaling a global developer network through the lens of the OpenSearch Project. We will examine how transitioning the project to the vendor-neutral OpenSearch Software Foundation under The Linux Foundation served as a major catalyst—unlocking deeper cross-industry collaboration, encouraging contributions from competing organizations, and accelerating enterprise deployment. Beyond governance, we will unpack how the global User Group & Ambassador programs bridges geographic and cultural divides to turn software users into active contributors and community leaders. Attendees will gain a clear framework for building localized, high-impact communities backed by transparent governance that directly accelerates open-source technology adoption. Key Takeaways for Attendees Transferring project stewardship to a vendor-neutral foundation builds enterprise trust, eliminates lock-in concerns, and encourages multi-vendor contributions. Scaling local User Groups (like OpenSearch Paris) while aligning with a global mission under open governance. Participation frameworks for transitioning community members from meetup attendees to maintainers, code contributors, event organizers, and project ambassadors.