Senior Cyber Defense Engineer — Endpoint & Threat Intel

La Fosse; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

La Fosse is seeking a senior technical contributor within a global cyber security team to own selected domains end-to-end and drive improvements to reduce cyber risk.

The role spans analyst and engineering duties across security tools, vulnerability management, web and email security, incident response, and threat-informed remediation. Collaboration with infrastructure, cloud, application, identity and business teams is essential to deliver measurable improvements to the cyber defence posture.

Qualifications

• Senior technical contributor in cyber or infrastructure security.
• Owned or contributed to cyber security domains such as endpoint security, vulnerability management, identity security, network security, incident response or M365/Azure security.
• Experience with CrowdStrike Falcon for endpoint protection, EDR investigations and response workflows.
• Experience with Zscaler ZIA/ZPA for secure web access and troubleshooting.
• Leading or supporting vulnerability and exposure management programmes including risk prioritisation and remediation tracking.
• Strong knowledge of real-world attacker TTPs and MITRE ATT&CK to prioritise mitigations.
• Experience conducting security investigations and incident response activities.
• Ability to translate threat intelligence into actionable security improvements.
• Collaborating with cross-functional teams to deliver security improvements.
• Scripting/automation to improve security outcomes.

Responsibilities

• Own cyber security domains end-to-end and drive measurable improvements.
• Collaborate with infrastructure, cloud, application, identity and business teams.
• Analyse detections and support incident response.
• Translate threat intel into actionable mitigations.
• Lead or support vulnerability management programmes.
• Design and tune security tools and policies.
• Prioritise remediation based on risk and exposure.
• Deliver measurable improvements to cyber defence posture.

Skills

CrowdStrike Falcon

Zscaler ZIA/ZPA

Vulnerability management

Threat intelligence

MITRE ATT&CK

Incident response

Automation / scripting

EDR investigations

Threat hunting

Tools

CrowdStrike Falcon

Zscaler ZIA/ZPA

Vulnerability management tools

Threat intelligence platforms

Job description

La Fosse is seeking a senior technical contributor within a global cyber security team to own selected domains end-to-end and drive improvements to reduce cyber risk.

The role spans analyst and engineering duties across security tools, vulnerability management, web and email security, incident response, and threat-informed remediation. Collaboration with infrastructure, cloud, application, identity and business teams is essential to deliver measurable improvements to the cyber defence posture.