Strong expertise in DNS architecture and protocols (BIND, Infoblox, Microsoft DNS, or similar) Deep knowledge of Linux administration (RHEL, CentOS, Ubuntu, or equivalent) Experience with on-premise infrastructure design and deployment

Strong understanding of:o TCP/IP, routing, switching, and network diagnosticso DNS security (DNSSEC, DDoS mitigation, split-horizon DNS) Experience operating in high-security or regulated environmentsOT/CNI Experience Proven experience in Operational Technology (OT) or Critical National Infrastructure (CNI) environments Knowledge of network segmentation, air-gapped systems, and industrial control environments Familiarity with SCADA systems, ICS networks, or similar industrial systems (desirable) Security & Compliance Strong understanding of cybersecurity principles in OT environments

Experience aligning with frameworks such as:o NCSC guidanceo IEC 62443o ISO 27001

Security Clearance (SC):o Active SC Clearance preferredo Candidates must be eligible for SC clearance if not already cleared