Senior OT Cyber Security Engineer

Trivela Talent; Melbourne; On-site; AUD 150,000 - 210,000; Full time

Job summary

Trivela Talent seeks a hands-on Senior OT Cyber Security Engineer to lead engagements securing operational technology in energy and critical infrastructure. You will work on real systems such as SCADA, historians and plant networks, focusing on hardening, segmentation and secure access.

You’ll communicate findings to engineers and executives, delivering tangible security improvements. The role emphasizes practical outcomes over policy writing, with opportunities to shape security in wind, solar

Qualifications

• 7+ years of cyber security, OT security or related engineering experience.
• Proven experience in energy, utilities or critical infrastructure environments.
• Hands-on capability with OS hardening, firewall configuration, network security and OT risk assessment/remediation.

Responsibilities

• Review critical infrastructure risk management plans against regulatory frameworks (SOCI, energy market requirements, IEC 62443).
• Assess OT/SCADA environments, OS baselining/hardening, patch/vulnerability/configuration management in OT contexts.
• Design firewall architectures, IT/OT boundary controls, network segmentation (Purdue/IEC 62443), secure remote/vendor access.
• Evaluate logging, monitoring and incident readiness.
• Produce gap analyses and actionable recommendations.
• Deliver reports and workshops for technical and executive audiences.

Skills

OT security

OS hardening

Firewall configuration

Network security

OT risk assessment

Executive communication

Consulting experience

Job description

We are seeking a hands-on Senior OT Cyber Security Engineer to lead consulting engagements focused on securing operational technology environments in the energy and critical infrastructure sectors.

If you want to spend your time improving the security of actual solar, wind and utility systems rather than writing policies that never leave the page, we should talk.

Key Responsibilities

• Review critical infrastructure risk management plans and supporting systems against relevant regulatory and industry frameworks (including SOCI obligations, energy market participant requirements, and IEC 62443)
• Assess OT and plant environments, including SCADA, historians, plant networks, operating system baselining/hardening (Windows/Linux), and patch/vulnerability/configuration management in OT contexts
• Review and design firewall architectures, IT/OT boundary controls, network segmentation (Purdue / IEC 62443), and secure remote/vendor access
• Evaluate logging, monitoring and incident readiness
• Conduct structured gap analyses and develop prioritised, practical recommendations
• Produce clear reports and deliver workshops for both technical and executive audiences

Requirements

• 7+ years’ experience in cyber security, OT security or related engineering
• Proven experience in energy, utilities or critical infrastructure environments
• Strong hands-on capability with OS hardening, firewall configuration, network security and OT risk assessment/remediation
• Ability to engage credibly with engineers, operators and senior stakeholders
• Consulting or advisory experience preferred

Mandatory Certifications

Applicants must hold at least one of the following:

• GICSP
• GRID
• ISA/IEC 62443 Cybersecurity Specialist or Expert
• CISSP (with demonstrable OT/energy experience)

This role suits a senior practitioner who wants to work on real operational systems and deliver tangible security outcomes in complex industrial environments.