This document is a case study detailing UST's approach to modernizing the software development lifecycle (SDLC) through AI-native practices using GitHub. It outlines the services provided by UST, including GitHub Copilot enablement, migration strategies, and automation frameworks. The case study emphasizes the importance of GitHub certifications and the expertise of UST's professionals in facilitating seamless transitions from legacy systems to GitHub. Specific methodologies such as repo migrations, scalable workflow migrations, and the establishment of best practices are discussed. The document also presents quantitative improvements achieved during the migration process, including increased developer productivity and reduced manual effort costs. Additionally, it highlights UST's commitment to embedding advanced features of GitHub within modern software architecture, ultimately aiming to enhance business capabilities and reduce time-to-market for clients. The case study serves as a comprehensive resource for organizations looking to adopt GitHub in their software engineering processes.