Talenza is exclusively partnering with a leading organisation within the critical infrastructure sector to secure an OT / IoT Security Lead, supporting a large-scale operational security uplift program across priority sites.

This engagement forms part of a broader cyber resilience initiative focused on strengthening segmentation, visibility, and monitoring across industrial control systems (ICS) and connected device environments. The program is aligned to regulatory obligations under Australia's Security of Critical Infrastructure (SOCI) framework and is designed to materially reduce operational cyber risk across essential services environments.

Reporting to the Cyber Security Operations Manager, you will lead the uplift of OT and IoT security controls across operational sites, providing deep hands-on expertise across assessment, architecture design, and control implementation.

This is not an advisory-only position. You will work directly with operations and engineering teams in live environments to assess current-state maturity, design segmentation strategies, deploy monitoring capabilities, and integrate IT/OT incident response processes.

As the OT / IoT Security Lead, you will:

* Assess and uplift OT security maturity across priority operational sites
* Define and implement segmentation and Zero Trust architecture approaches for OT and IoT environments
* Support deployment of network visibility and monitoring tooling across ICS environments
* Partner with engineering and operational stakeholders to identify and mitigate cyber risk
* Align OT and IoT security controls to SOCI obligations and regulatory requirements
* Develop and integrate IT/OT incident response playbooks
* Conduct site-based risk assessments and provide executive-level reporting
* Monitor the OT/IoT threat landscape and provide intelligence-led security guidance
* Develop and formalise OT security policies, standards, and procedures

* OT risk assessments completed across all priority operational sites
* Segmentation review completed with roadmap defined and implementation initiated
* Monitoring and detection capability uplifted across key OT environments
* IT/OT incident response playbooks developed, tested, and operationalised

* Strong hands-on OT and ICS security implementation experience (advisory-only profiles will not be considered)
* Experience within critical infrastructure or regulated operational environments
* Practical exposure to industrial protocols across ICS environments
* Proven experience designing network segmentation within converged IT/OT architectures
* Familiarity with OT security frameworks such as IEC 62443 and NIST SP 800-82
* Experience with OT-specific tooling such as Claroty, Dragos, or Nozomi Networks (desirable)
* Experience working closely with operational and engineering stakeholders
* Relevant certifications such as GICSP, CSSA, or equivalent (desirable)

Thank you for your interest. Please note that we are only able to consider candidates based in Brisbane or Melbourne, as the role requires in-office attendance. Candidates must have full rights to work in Australia.