GRAIL is seeking a mission-driven and high-impact Staff Cloud Security Engineer to serve as a technical cornerstone for product security initiatives across the company. Reporting to the Director of Product Security, this role plays a critical part in enabling secure, resilient products that support GRAIL’s life‑saving mission. As a Staff-level individual contributor, you will lead the technical execution of the Cloud Security roadmap, partnering closely with Engineering, Platform, Infrastructure, DevOps, and Product teams to drive secure cloud transformation initiatives. You will provide guidance to other engineers while influencing cloud architecture, DevSecOps practices, and secure development decisions across the product and infrastructure lifecycle. This role will help teams navigate an evolving threat landscape by implementing scalable AWS security controls, automation, and cloud-native security best practices while maintaining engineering agility and delivery velocity in a highl