The National Geospatial-Intelligence Agency has adopted open source software development and cloud computing as technology initiatives that are very important to furthering its strategic objectives. This represents a huge cultural shift from the way its software development is currently done. Part of this effort involves an adoption of DevOps and automated provisioning of infrastructure. MITRE participated in a pathfinder effort to migrate legacy applications to a cloud architecture provisioned by Chef. I'll discuss the challenges of regularly merging that open source code back into various closed, disconnected networks.