The Senior Engineer, Cloud Security is responsible for strengthening and operating PayCargo's security controls across a modernizing platform that spans legacy systems, a multi-account AWS environment, Microsoft Entra ID, GitHub/ZenHub workflows, GitHub Actions pipelines, and a growing set of secure AI platform requirements. The Senior Engineer - Cloud Security continuously monitors the perimeter, hardens cloud and endpoint controls, runs access reviews, supports audits, and leads incident response, turning security obligations into repeatable operational controls rather than one-time checklist items.