SIEM Content Development Specialist

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The SIEM Content Development Specialist plays a critical role in advancing the Cyber Security Operations Center’s ability to detect and respond to cybersecurity incidents. This role focuses on designing and developing cutting‑edge detection content leveraging a wide array of security technologies and telemetry to identify malicious activity and guide security analysts through effective response playbooks.

• Contribute to continuous improvement initiatives across multiple technologies by developing and refining content that enhances threat detection and response capabilities
• Develop and optimise threat detection content, including tuning of threat and vulnerability management technologies and continual refinement of SIEM rules and logic to enhance detection accuracy and operational performance
• Lead and contribute to the optimisation and modernisation of SIEM content, supporting the adoption of next‑generation SIEM technologies and cloud‑native security tools
• Manage the lifecycle of detection content, including development, testing, release, and retirement, using version control and documentation best practices
• Collaborate with Dev Ops/Sec Ops teams to integrate security content into broader CI/CD workflows
• Collaborate with the CSOC Manager to support improvements in security operations through effective content contributions
• Support security event analysis by participating in and possibly driving security event analysis activities to address current cyber threats
• Assist in threat response activities, providing analytical input from a blue team perspective to help identify potential threat group behaviours
• Contribute to the creation of cybersecurity reports and advisories, ensuring timely and accurate dissemination to key stakeholders
• Participate in residual risk assessments, supporting post‑incident analysis and the documentation of operational and technical lessons learned
• Collaborate with data owners and customers to understand data sources and use cases, and successfully translate requirements into actionable content

• Minimum of 2‑5 years’ experience in SIEM content (rule logic and code) development role
• Minimum of 2 years of SOC analyst experience (Level 2 or above) required
• In‑depth and extensive hands‑on experience in security event analysis, creating and refining SIEM/EDR rules and delivering efficiency within the SIEM and other technologies used within the team
• Deep knowledge of IPv4/IPv6, TCP networking protocols
• Deep knowledge of Windows/Linux operating systems
• Exceptional working knowledge of security technologies such as SIEM (Arc Sight, Sentinel, QRadar, Log Rhythm, Splunk), EDR (Microsoft Defender, Fire Eye, Tanium), IDS/IPS, firewalls, proxies, web application firewalls, anti‑virus, etc.
• Comprehensive understanding of Windows Security Event logs and Syslog
• Excellent familiarity with endpoint/perimeter security attack vectors and detection (blue/purple teaming)
• Excellent familiarity with standard security frameworks such as MITRE, cyber kill chain and APT campaign strategies
• Outstanding knowledge of cloud platforms such as Azure, O365, Google Cloud, AWS, Oracle
• Experience with modern SIEM platforms, including cloud‑native or hybrid solutions
• Hands‑on experience with CI/CD pipelines and automation tools for security content deployment
• Proficiency in version control systems (e.g., Git) for managing SIEM content
• Excellent working knowledge of regular expression development
• Scripting and programming experience is highly desirable
• Kusto or SQL knowledge, including rule/query optimisation
• Proven ability to prioritise workload, meet deadlines and utilise time effectively
• Good interpersonal and communication skills, works effectively as a…