Staff Security Engineer, Cloud & AI Platform

Location US TN - Remote Job Description The Staff Security Engineer, Cloud & AI Platform is a deeply technical, hands-on role responsible for making Brookfield Real Estate’s cloud and AI platforms secure by design. You will lead security architecture and implementation across AWS, Infrastructure as Code, software delivery, internally developed applications, and AI/agent systems. This is a builder role. You will threat-model a design, review the underlying Terraform and application code, implement the control, instrument it, and help teams adopt it without unnecessary friction. Security requirements become reusable modules, automated checks, secure defaults, and clear engineering guidance rather than documents and findings lists. You will partner closely with Cloud Solutions, application engineering, AI engineering, Identity, CyberOps, and GRC/Privacy. Platform engineering continues to own general platform uptime, capacity, and deployment mechanics, and CyberOps continues to own alert triage; this role owns the architecture, controls, tooling, and assurance mechanisms that make those systems safe. Role & Responsibilities: Leadership & Security Architecture Help define security architecture for the cloud and AI platforms: set direction, write specs, and steward secure-by-default patterns across teams Define security engineering standards and paved roads, document important decisions, and communicate risk and trade-offs to engineering and business leadership Review infrastructure and application designs for authorization, network, data-protection, secrets, and tenant-isolation risks Mentor engineers and raise the organization’s ability to make sound security decisions independently Partner with Cloud Solutions, application engineering, AI engineering, Identity, CyberOps, and GRC/Privacy to prioritize work and drive adoption Cloud & Identity Security Own and evolve security architecture for a multi-account AWS organization — account boundaries, service control policies, IAM Identity Center, delegated security services, KMS, VPC controls, and WAF Design least-privilege human and workload access across AWS, Okta, GitHub Actions, and Infrastructure as Code platforms using federation and short-lived credentials Build and maintain reusable security controls in Terraform or OpenTofu, with safe rollout, testing, monitoring, and recovery patterns Strengthen centralized logging and evidence — CloudTrail, Config, GuardDuty, Security Hub, Macie, and CloudWatch — and...

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