\begin{abstract} In this paper, we examined the case of a 30-month government-academia development collaboration to map empirical practices that harmonized the differences in open source software project management on both sides. We evidence our adopted practices from the data collected on the repository management tool of the developed platform itself. The benefits of the created empirical management model in this project are revealed by the results of surveys with participants on both sides of the project. These results suggest the adoption of empirical practices based on open source ecosystems and agile methodologies to improve the software development in context with different organizational culture and people mindset. \end{abstract} \keywords{Open Source Software, Project Management, Government.}