Lumen Technologies in Melbourne is seeking a senior Security Platform & SecOps Engineer to own and evolve the MSSP security platform stack, delivering scalable and automated 24x7 SOC services. You will design architectures, implement telemetry pipelines, and build SOAR playbooks, working across SIEM, XDR, cloud security, and threat intel to protect customers. This role demands leadership, deep tooling expertise, and a drive to continuously improve security outcomes.