TODO group has published a series of useful guidelines on how to create an open source program office but the reality of implementing can come with unexpected challenges and surprising opportunities. The broad scope of an open source program requires cross-functional coordination between multiple teams with differing goals, culture, focus areas, perspectives, and priorities, including legal, engineering, design, product, business, marketing, and branding. The success of the open source movement has made the concept of open source software so pervasive that it created another layer of challenges in education and communication. This talk will provide the honest story of my one-year journey of building the open source program office at Uber. I will share my observations and takeaways, as well as what I found rewarding and impactful during the process.