This document is a guide on responsible cloud engineering, detailing the importance of treating cloud consumption as a critical engineering concern. It outlines how G2 Ops applied engineering discipline to their federated IL5 cloud environment, resulting in a significant 44% reduction in cloud consumption over a month. The guide emphasizes that cloud costs can accumulate silently without proper visibility and governance, leading to operational risks. It presents specific improvements made by G2 Ops, such as strengthening account structures, increasing cloud transparency through real-time dashboards, and optimizing system uptime. The document stresses that responsible cloud engineering is not merely about reducing costs but about intentional spending aligned with mission outcomes. It encourages organizations to adopt a disciplined approach to cloud governance, ensuring that cloud environments are managed effectively to enhance digital resilience. The guide concludes with a call for leaders to reassess their cloud strategies and commit to engineering discipline.