IT Security Officer - Operational Technology (OT) Security (Public Sector)

At Xtremax, we're looking for an experienced IT Security Officer specialising in Operational Technology (OT) Security to support mission-critical meteorological systems that operate around the clock. You'll play a key role in protecting the infrastructure behind weather observation, forecasting, and environmental monitoring platforms that deliver essential services to the public.

Working within a highly specialised OT environment, you'll secure critical systems including weather radar networks, satellite ground stations, automated weather observation systems (AWOS), and upper-air sounding infrastructure. This role combines cybersecurity engineering, risk management, security operations, and regulatory compliance across hybrid IT/OT environments.

You'll work closely with infrastructure engineers, security stakeholders, and technology partners to strengthen cyber resilience while ensuring the continuous availability of systems supporting national weather operations.

Responsibilities

• Protect operational technology (OT) infrastructure supporting meteorological systems through proactive security monitoring and incident response.
• Discover and maintain an accurate inventory of OT assets using passive monitoring technologies without disrupting live operations.
• Develop and maintain IT/OT network architecture documentation, topology diagrams, and data flow mappings to support security assessments and risk management.
• Operate and optimise SIEM platforms, IDS/IPS, and endpoint security tools to detect and investigate security threats across hybrid environments.
• Coordinate vulnerability assessments, penetration testing, patch management, and remediation activities while balancing operational uptime requirements.
• Conduct cybersecurity risk assessments and ensure compliance with recognised frameworks including NIST SP 800-82, IEC 62443, FISMA, and organisational security policies.
• Support security incident investigations and collaborate with internal stakeholders and relevant cybersecurity authorities where required.
• Evaluate third-party technologies and vendors to identify supply chain security risks and strengthen overall security posture.
• Develop cybersecurity awareness programmes tailored for OT environments and provide technical guidance on operational security best practices.
• Support business continuity planning and disaster recovery readiness for mission-critical operational systems.

• Degree in Cybersecurity, Computer Science, Information Technology, or a related discipline.
• Minimum 5 years of experience in cybersecurity, IT security, or OT security roles.
• Hands-on experience with Security Information and Event Management (SIEM), IDS/IPS, endpoint detection, and security monitoring technologies.
• Experience performing vulnerability management, security assessments, and incident response.
• Strong understanding of Operational Technology (OT), Industrial Control Systems (ICS), or SCADA security concepts.
• Good knowledge of cybersecurity frameworks including NIST, IEC 62443, FISMA, or equivalent standards.
• Active professional certification such as CISSP, CISM, CEH, GICSP, or an equivalent cybersecurity certification.
• Ability to obtain the required government security clearance where applicable.

Preferred

• Experience securing critical infrastructure or government environments.
• Familiarity with meteorological systems, environmental monitoring platforms, or remote sensing technologies.
• Knowledge of cloud security across hybrid environments such as AWS or Microsoft Azure.
• Experience working within 24/7 operational environments.
• Knowledge of WMO standards, weather data formats (BUFR, GRIB, NetCDF, IWXXM, GeoJSON), or related technologies.

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