From the public administration for the public administration: OpenCoDE, hosted by the Centre for Digital Sovereignty (ZenDiS), is Germany's nationwide platform where federal, state, and local government agencies can discover, build, and share open-source software. The ultimate goal of OpenCoDE is to establish an infrastructure that encourages the adoption of sustainable open source solutions within the public sector. A crucial aspect of achieving this goal is implementing a secure software development life cycle (SDLC), and Open CoDE offers an ideal environment for developing secure applications. One such application is openDesk, ZenDiS’ integrated suite designed for collaborative office tasks within the public sector. It incorporates proven open-source tools and makes its source code publicly available via OpenCoDE, demonstrating how Open CoDE supports the development of secure and dependable applications.