The provided document outlines a comprehensive strategy for Energinet, Denmark’s Transmission System Operator, to modernise its software development capabilities, balancing the need for rapid digital transformation with the critical imperative of grid resilience. It proposes a “Two-Lane Operating Model” to manage varying risk profiles, separating safety-critical systems from exploration and enterprise applications. Key recommendations include establishing a Platform Engineering team to build an Internal Developer Platform (IDP), adopting Team Topologies for organisational design, and implementing automated, risk-based governance through Policy-as-Code (PaC). The report also stresses the importance of Site Reliability Engineering (SRE) principles, the use of a digital twin for validating high-risk changes, and a governed AI-first development strategy that prioritises human oversight in critical contexts. Ultimately, the aim is to achieve elite software delivery performance as measured by DORA and SPACE metrics, while fostering a high-performance engineering culture and responsibly integrating AI into the Software Development Lifecycle (SDLC).