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

Requirements

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

Benefits

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