Lachlan Kidson focused on enhancing CI/CD security and reliability for the Skyscanner/backpack-ios repository over a two-month period. He consolidated and overhauled GitHub Actions workflows, introducing a dedicated security analysis workflow and tightening permissions to strengthen the project’s security posture. Using YAML and XML, Lachlan standardized environment variable handling, implemented explicit token persistence controls, and pinned tool versions to ensure reproducibility. He also improved workflow governance by refining release management and adjusting pull request configurations for safer automation. These targeted engineering efforts resulted in more stable, predictable CI runs and streamlined onboarding, reflecting a deep understanding of DevOps and continuous integration practices.