ON.energyis building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets. ON recently announced a 5GW partnership, with 3GW currently under construction across multiple hyperscale data center campuses. With patented technology and proprietary software,ON.energydevelops projects worldwide that set new benchmarks for resilience.

Key Responsibilities
- The multi-account security foundation. AWS Organizations structure, SCPs, guardrails, a security tooling account, centralized logging, and secure baselines — delivered as infrastructure as code, not console clicks.
- Security standards and review gates. You can mandate controls and block deploys that introduce unacceptable risk, through review gates on identity and network changes, a documented exception path, and a defined escalation route.




- AWS identity and access. IAM Identity Center as the single front door, federated with Entra ID in partnership with IT, who own Entra as the source of truth. Role and group model mapping job functions to permissions; joiner/mover/leaver; privileged and break-glass access; workload identity; recurring access reviews. Hands-on at first, progressively automated so it stops being manual work.
- Cloud-to-site connectivity and segmentation — the defining part of this role. Every plant, BESS site, and remote asset that reaches our cloud does so over a path you design and defend: site-to-cloud VPN and private connectivity, hard segmentation between IT and OT zones, DMZ and broker patterns for site telemetry, certificate and device identity for field gateways, remote vendor access to sites, and strict control over what may initiate traffic in each direction. You own the cloud side of that boundary and share the path itself

📌 AWS Cloud Security Engineer (Buenos Aires)
🏢 On.Energy
📍 Buenos Aires