Senior Platform Security Engineer
Role Overview
Own operational security for Firmus's large-scale AI infrastructure and multi-tenant Kubernetes estate.
Build and operate production security controls for access, admission policy, workload identity, network policy, and runtime enforcement.
Serve in a hands-on senior role with authority to grant or refuse security exceptions.
Key Skills for This Role
Full Job Posting
Role Summary
Own operational security for Firmus's large-scale AI infrastructure and multi-tenant Kubernetes estate.
Build and operate production security controls for access, admission policy, workload identity, network policy, and runtime enforcement.
Serve in a hands-on senior role with authority to grant or refuse security exceptions.
Key Responsibilities
- Build eBPF-based runtime visibility and enforcement using tools such as Cilium, Falco, or Tetragon.
- Own security gates for image signing, software bills of materials, vulnerability gating, and policy checks.
- Set Kubernetes security content, including admission policy, workload identity, and network policy.
- Continuously validate Kubernetes control-plane and baseline security standards in production.
- Test controls limiting compromise blast radius across tenant boundaries.
- Investigate security-related operational anomalies and respond appropriately.
- Operate controls aligned with ISO 27001 and NIST and produce security evidence.
- Provide senior security escalation support, incident-review input, and mentoring.
- Independently monitor privileged activity across identity, certificate, and secrets platforms.
Required Skills
- Strong privileged access security experience, including least privilege, secrets management, and production auditing.
- Strong experience securing multi-tenant Kubernetes environments.
- Extensive eBPF-based runtime security detection and enforcement experience.
- Strong DevSecOps experience with delivery-pipeline security gates.
- Experience with Kubernetes and delivery-pipeline policy-as-code tooling.
- Senior security-fault escalation experience in a 24/7 production environment.
- Strong scripting or programming ability for security automation.
- Clear technical judgement and communication skills.
Preferred Experience
- GPU or HPC infrastructure and multi-tenant AI workload security experience is preferred.
- Service provider, cloud, or colocation environment experience is preferred.
- ISO 27001, SOC 2, or NIST evidence-production experience is preferred.
- A relevant security certification is preferred.
- A bachelor's degree in a relevant discipline or equivalent experience and training is preferred.
On-call
- Share the after-hours escalation roster with other senior engineers; first-line monitoring and response are handled by the operations centre.
Location
- Based in Australia or Singapore, with travel to Australian AI Factory sites as required.
About Firmus Technologies
Australian private AI infrastructure company building energy-efficient AI factories and cloud services across Asia-Pacific.
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