Requirements

A relevant degree in Computer Science, Computer Security, Statistics, Mathematics or related field, or equivalent practical experience in cybersecurity, infrastructure engineering, incident response or related operations.
Hands-on experience with Active Directory, Entra ID or other enterprise identity platforms in complex enterprise environments.
Understanding of identity-related attack techniques.
Experience 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 including evenings, nights, weekends and holidays.
Ability to obtain Security Check (SC) or Developed Vetting (DV) clearance issued by the United Kingdom Security Vetting Unit (UKSV) and meet Microsoft, customer, and/or government security screening requirements.

Nice to Haves

Experience in cybersecurity incident response, digital forensics, threat hunting or enterprise recovery.
Familiarity with Microsoft Defender XDR, Microsoft Sentinel, Entra ID, Microsoft Graph, Azure, Windows security eventing and third-party SIEM/SOAR or EDR platforms.
Experience leading infrastructure workstreams in high-pressure, customer-facing incident response 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.

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 to guide validation and decision-making.
Direct or guide technical response activities balancing containment, recovery urgency, evidence preservation and customer business constraints.
Collect, preserve and analyze infrastructure and identity evidence needed to support investigation, containment and recovery decisions.
Serve as a technical point of contact for infrastructure recovery; communicate clear findings, priorities and decision options to customer technical teams, executives and internal stakeholders.
Maintain technical documentation and ensure clear handovers covering evidence, decisions, risks, dependencies and next actions; support final reporting and lessons learned.
Share practical recovery expertise, mentor colleagues and help shape the future of Defender Experts Cybersecurity Incident Response.

Competitive salary range of £74,700.00 - £122,600.00 per year (UK).
Eligibility for benefits and other compensation.
Opportunity to work as part of a globally distributed, mission-driven team.
Growth mindset, innovation, collaboration, respect, integrity, accountability and inclusion are core values.