Security Engineer - EY General Delivery Services

Location: CABA

Other locations: Primary Location Only

STS Lab Operations Engineer (Rank 64)

The Opportunity

The EY Security Technology Services (STS) Lab is the innovation and engineering engine behind EY's global cybersecurity platform. As a Lab Operations & Access Engineer at the Supervising Associate level within the STS Lab team in GDS Argentina, you will be the hands-on operational backbone of the lab's day-to-day functioning. You will own lab account provisioning, RBAC governance, shared asset management, and request fulfillment - ensuring that engineers, architects, and SMEs across IAM, Defender XDR, Sentinel, and Purview can work in well-governed, properly segmented lab environments. You will work closely with the STS Lab Lead, Cloud Platform Security Architects, and the Configuration & Automation Engineering team to maintain the operational health and access integrity of the lab's Microsoft Fabric and Azure-based building blocks.

Your Key Responsibilities
- Lab Account Management - Provision, maintain,



and decommission lab user accounts across Azure AD / Entra ID, Microsoft 365, and Fabric tenants following defined lifecycle processes.
- RBAC & Access Governance - Design, implement, and audit Role-Based Access Control across Azure subscriptions, Fabric workspaces, Microsoft Defender, and Microsoft Sentinel environments; enforce least-privilege principles.
- Shared Asset Management - Track and govern shared lab resources including virtual machines, shared credentials vaults, and network segments to prevent configuration drift.
- Serve as the first point of contact for day-to-day lab support requests; triage access issues, environment faults, and provisioning requests with defined SLAs.
- Azure Portal Deployments - Execute controlled deployments through the Azure Portal and ARM/Bicep templates for new lab resources; coordinate change approvals and maintain deployment logs.
- GitHub Workflows - Manage lab a

📌 Security Engineer (Buenos Aires)
🏢 Ernst & Young Advisory Services Sdn Bhd
📍 Buenos Aires