Senior IT Security Analyst

Salary: £70,000 - 82,500 per year

Requirements

• Strong hands-on experience administering, tuning and operationalising CrowdStrike Falcon, including endpoint protection, EDR investigations, detection analysis and response workflows.
• Strong hands-on experience administering and supporting Zscaler ZIA and ZPA, including policy design, access control, traffic analysis and security troubleshooting.
• Practical experience leading or supporting vulnerability and exposure management programmes, including vulnerability analysis, risk-based prioritisation, remediation tracking and validation of control effectiveness.
• Strong knowledge of real-world attacker tactics, techniques and procedures (TTPs) and the ability to translate threat intelligence, attack paths and exploitation trends into actionable security improvements.
• Experience conducting security investigations and incident response activities, including alert triage, root cause analysis, containment, remediation and lessons learned.

Responsibilities

• Act as a senior technical contributor within our global cyber security team, owning selected cyber security domains end-to-end and driving practical improvements to reduce cyber risk.
• Combine analyst and engineering responsibilities across security tools, vulnerability and exposure management, web and email security, incident response and threat-informed remediation.
• Work closely with infrastructure, cloud, application, identity and business teams to identify security issues, prioritise actions based on real-world attacker behaviour and deliver measurable improvements to our cyber defence posture.
• Own or materially contribute to cyber security domains such as endpoint security, vulnerability management, identity security, network security, incident response or Microsoft 365 / Azure security.
• Use CrowdStrike or equivalent EDR tooling to investigate detections, support incident response and improve endpoint security controls.
• Use Zscaler ZIA/ZPA or equivalent secure web gateway, private access, zero trust or network access security technologies.
• Perform vulnerability assessment, exposure analysis and remediation prioritisation across our enterprise technology environment.
• Apply threat intelligence, MITRE ATT&CK and exploitation-based evidence to prioritise mitigations.
• Support or lead cyber security investigations and incident response activities.
• Collaborate with infrastructure, cloud, application, identity and business teams to deliver security improvements.
• Use scripting, queries, automation or data analysis to improve security outcomes.

Technologies

• Azure
• Cloud
• Support
• Microsoft 365
• Network
• Security
• Web
• Office 365

More

We are a global cyber security team seeking a Senior IT Security Analyst for a hybrid role based in London, working three days a week in our office and two days remotely. This role is focused on strengthening our cyber defence posture through hands-on security operations, technical investigation and practical risk reduction across key domains including endpoint security, vulnerability management, web and email security, and incident response.

last updated 31 week of 2026