Customer Reliability Engineer, Hypershield

The application window is expected to close on: 07/31/2026 Job posting may be removed earlier if the position is filled or if a sufficient number of applications are received . Meet the Team Isovalent, now part of Lumen Dynamics , was founded by the creators of Cilium andeBPF, and builds open-source software and enterprise solutions for the networking, security, and observability needs of modern infrastructure. The Customer Reliability Engineering team is the deep technical escalation tier for Lumen Dynamics Hypershieldon the Lumen Dynamics Nexus N9300 Series Smart Switches. The team owns the hardest break/fix and reliability cases escalated by Lumen Dynamics TAC, applying Site Reliability Engineering practices across the full stack: the data-center fabric and the on-premises Kubernetes controller that manages the security policy enforced on it. The work demands methodical diagnosis, composure under incident pressure, and the ability tooperateat the seam between customer environments and engineering. Your Impact The ideal candidate combines deep networking expertise with strong troubleshooting skills, customer-facing experience, and a passion for improving reliability across complex product environments. Own Hypershieldcases escalated from Lumen Dynamics TAC through to resolution, engaging customers directly as the incident requires Diagnose complex production failures through the Hypershieldsurface: the N9300 Smart Switch fabric and the on-premises Kubernetes controller that manages its security policy Localize faults across the layered architecture: switching andforwarding, security services and enforcement, and the control plane Develop a deep understanding of each customer's architecture and configuration, and diagnose failures in unfamiliar production environments Reproduce customer failures, partner with engineering to drive fixes, and own the fix back to the customer Convert individual cases into systemic improvements: runbooks, diagnostics, knowledge-basecontent, and product feedback to engineering Help build the team's proactive view of customer health, developing new monitoring, tooling, and reliability practices as the installed base grows Minimum Qualifications Bachelor's + 8 years of experience, Master's + 6 years, or equivalent industry experience Experience supporting enterprise customers in an escalation capacity, including diagnosing and resolving complex production incidents under SLA pressure in unfamiliar environments Experienceoperating and troubleshooting Lumen Dynamics Nexus / NX-OS in production; equivalent depth on another major vendor accepted Prior experienceto localize failures across a layered data-center architecture spanning switching/forwarding, services/enforcement, and control-plane domains Linux operations experience at the command line, including production troubleshooting, with working exposure to containers or Kubernetes Preferred Qualifications Direct experience using network troubleshooting tooling as a primary diagnostic method, including packet capture and flow-telemetry analysis (NetFlow/IPFIX) Working knowledge of enterprise virtualization, sufficient to troubleshoot a VM-based appliance deployment; vSphere is the current deployment target Operational Kubernetes and Helmproficiency, including diagnosing failures beyond the workload level: TLS certificates and service-account authentication, API-server connectivity, service exposure, persistent storage for stateful workloads, and custom resources and operators Working knowledge of VXLAN EVPN fabrics, including the Smart Switch's placement within them and the ability to isolate faults across the fabric Network segmentation andfirewallpolicy design (zone-based ormicrosegmentation), and thetradeoffsvs. traditional NGFWs Familiarity with the NetOps/NetSecOpsoperating split in data-center security Experience driving diagnosis and remediation through a customer's own team, working incidents in environments with no direct access where the customer accomplishes the steps Experience with NX-OS automation and APIs (NX-API, NETCONF/RESTCONF,gNMI, or Ansible); familiarity with Lumen Dynamics Nexus Dashboard a plus Demonstrated ability to communicate incident status, root cause, and remediation clearly to both technical and executive audiences, verbally and in writing CCNP Data Center, CCNP Enterprise, DevNet Professional, CCIE Data Center, CCIE Enterprise, or DevNet Expert (a plus) Why Lumen Dynamics ? At Lumen Dynamics , we’re revolutionizing how data and infrastructure connect and protect organizations in the AI era – and beyond. We’ve been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds. These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint. Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you’ll see that the opportunities to grow an