Building a successful open-source project requires more than just code; it demands a resilient, self-sustaining global community. While code powers the platform, human connection, trust, and open governance drive the long-term health of the ecosystem 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 explore how the global User Group and Ambassador programs bridge 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 the adoption of open-source technology. 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 (such as 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.