Claranet Limited
The Role
The Senior Security Engineer (Team Leader) is responsible for leading a dedicated security engineering team, combining hands-on platform engineering with technical leadership and people management.
You will own security platform architecture, act as the primary escalation point for complex issues, and ensure platforms remain secure, resilient, and compliant within a regulated environment.
Key Responsibilities
- Act as technical lead for security engineering and platform architecture
- Serve as primary escalation point for complex and major incidents
- Provide technical leadership and mentoring to engineers and analysts
- Line manage and develop the security engineering and analyst teams
- Own platform maintenance, configuration, and lifecycle management
- Ensure security platforms are integrated across hybrid environments
- Oversee patching, upgrades, and platform performance
- Drive platform improvements and engineering enhancements
- Support detection engineering, tuning, and platform optimisation
- Lead automation and SOAR initiatives to improve efficiency
- Collaborate with SOC providers on SIEM governance and data ingestion
- Ensure platforms meet regulatory and compliance requirements
- Maintain engineering documentation, standards, and governance
- Represent engineering in client governance and audit activities
- Coordinate cross-team resolution of complex technical issues
Experience & Knowledge
Essential:
- Significant experience in security engineering and platform management
- Strong leadership experience managing technical teams
- Deep knowledge of Microsoft Defender and SIEM platforms (e.g. Sentinel)
- Experience in hybrid cloud and on-prem environments
- Strong understanding of security architecture and frameworks
- Experience in regulated environments (e.g. financial services)
- Strong stakeholder and client engagement skills
- Experience with automation and scripting (PowerShell, Python, etc.)
Desirable:
- Experience with vulnerability and exposure management tools
- Knowledge of security frameworks (NIST, ISO 27001, CIS)
- Relevant security certifications (e.g. CISSP, AZ-500, SC-100)
To apply for this job please visit www.reed.co.uk.
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