We are seeking a highly experienced Technical Lead – Cyber Defence Specialist to support the delivery of a major cyber security uplift program within a large critical infrastructure workplace.

This role sits within a Digital Technology and Innovation Project Management Office and will provide deep, hands‑on technical expertise across Security Operations and Defence initiatives. The focus will include SIEM/SOC capability enhancement, detection engineering, OT vulnerability discovery, and risk‑based remediation design across both Corporate IT and Operational Technology (OT) environments.

Working closely with Cyber Program leadership, you will execute complex technical delivery activities to ensure solutions are operationally effective, securely integrated, and aligned with enterprise cyber strategy, regulatory obligations, and industry frameworks including the ACSC Essential Eight and NIST Cybersecurity Framework (CSF) 2.0.

This is a Brisbane‑based role with hybrid working arrangements (minimum three days onsite per week).





Key responsibilities

- Lead specialist technical delivery across SOC uplift and OT vulnerability management initiatives
- Produce detailed cyber security designs in collaboration with program and strategy leads
- Configure, optimise and enhance SIEM capabilities (including Microsoft Sentinel), analytics rules, automation workflows and monitoring processes
- Develop detection use cases, logging standards, and telemetry normalisation across diverse IT and OT assets
- Conduct threat modelling, threat hunting and threat analysis aligned to MITRE ATT&CK; (IT and IT/ICS/OT matrices)
- Design and implement risk‑based vulnerability management approaches, particularly within OT environments
- Develop incident response playbooks, SOC runbooks and SOAR automation logic
- Integrate vulnerability tooling with SIEM platforms to enable risk‑informed monitoring and re

📌 Cyber Security Specialist (Brisbane City)
🏢 Exclaim IT
📍 Brisbane City