Security Researcher - Cybersecurity Infrastructure Engineer

Working with lead investigators, threat hunters, reverse engineers and incident coordinators, you will help customers make evidence-led recovery decisions and improve security outcomes.

As a Cybersecurity Infrastructure Engineer, you will lead and support evidence-driven infrastructure response, identity recovery and technical hardening workstreams across enterprise on-premises and cloud environments.

Set infrastructure recovery objectives, technical priorities and evidence requirements for identity, directory, privileged access and enterprise infrastructure workstreams.

Lead or support containment and recovery for compromised Active Directory, Entra ID, Tier 0 and hybrid infrastructure environments.

Assess compromise scope, recovery readiness, trust relationships, privileged access pathways and security-control gaps; establish what is known, what remains uncertain and what additional validation is needed.

Direct or guide technical response activities that balance containment, recovery urgency, evidence preservation and customer business constraints.

Collect, preserve and analyse infrastructure and identity evidence needed to support investigation, containment and recovery decisions.

Serve as a technical point of contact for infrastructure recovery; brief customer technical teams, executives and internal stakeholders with clear findings, priorities and decision options.

Maintain technical documentation and clear follow-the-sun handovers covering evidence, decisions, risks, dependencies and next actions; support final reporting and lessons learned.

A relevant degree in Computer Science, Computer Security, Statistics, Mathematics or a related field, or equivalent practical experience in cybersecurity, infrastructure engineering, incident response or related operations, and of industry experience.

Demonstrated hands-on experience with Active Directory, Entra ID or other enterprise identity platforms in complex enterprise environments.

Understanding of identity-related attack techniques.

supporting identity recovery, infrastructure recovery and post-breach hardening decisions under operational pressure.

Familiarity with Windows Server infrastructure, DNS, DHCP, Group Policy, privileged access and hybrid identity dependencies.

Ability to script or automate recovery, validation or analysis tasks using PowerShell or similar tools.

Demonstrated ability to explain technical findings, dependencies, risk and residual uncertainty clearly to customers and internal stakeholders.

Flexibility to work non-standard business hours that may include evening, nighttime, weekends and/or holidays.

in cybersecurity incident response, digital forensics, threat hunting or enterprise recovery.

leading infrastructure workstreams in high-pressure, customer-facing incident response while balancing investigation, containment and recovery needs.

Demonstrated ability to translate technical constraints into practical response plans and executive-ready recommendations.

Relevant security, identity, cloud or incident response certifications, or equivalent practical expertise.

Demonstrated research, analytical automation, data-quality improvement or technical mentoring that strengthens infrastructure response capability.

The successful candidate should have or be able to obtain the Security Check (SC) or Developed Vetting (DV) clearance as issued by the United Kingdom Security Vetting Unit (UKSV).

Security Research IC4 - The typical base pay range for this role across United Kingdom is £ 74,700.00 - £ 122,600.00 per year.

Certain roles may be eligible for benefits and other compensation.