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Senior Security Analyst

London, Greater London, South East, England
£80000 - £90000 per annum
Permanent
Job Ref:BH-23413
Senior Security Analyst / Security Engineer 📍 London (City) | 💷 £80,000–£90,000 | Permanent

If you’re the kind of security engineer who can spot an active threat, contain it calmly, and then harden the environment so it doesn’t happen again — this role is built for you.

We’re hiring a hands-on Senior Security Analyst / Security Engineer to strengthen a Microsoft-centric security posture across detection, response, tooling, and infrastructure hardening. Not a one-lane SOC role. Not governance-heavy. This role blends incident response with security engineering and hardening and ideal for someone with 4–5 years’ experience who wants real technical ownership and variety across the full defensive lifecycle.

What You’ll Be Doing
  • Lead investigations, triage and containment using SIEM/EDR (Microsoft Sentinel preferred)
  • Harden IAM, PIM/PAM, Windows/Linux, endpoint baselines and identity services
  • Strengthen M365 security: Defender for Endpoint/O365/Identity, Conditional Access, Identity Protection
  • Improve detection rules, analytics, baselines and security automation
  • Run vulnerability scanning using tools like Tenable, Pentera, Varonis, Secure Score
  • Support compliance work (ISO 27001, Cyber Essentials, NIST, SOC2)
  • Contribute to threat hunting, threat intelligence application and proactive monitoring
  • Support operational resilience: scenario testing, DR exercises, post-incident reviews
  • Assist with security tooling assessments (including AD hardening tools)
Essential Experience (Must Haves) Candidates must have:

Security Engineering & Hardening
  • IAM, PIM/PAM, identity lifecycle, access hardening
  • OS security hardening (Windows Linux)
  • Network security concepts (firewalls, IDS/IPS)
Incident Response & Detection
  • Hands-on IR: triage → investigation → containment → recovery
  • Experience with SIEM (Sentinel strongly preferred)
  • Experience with EDR/XDR tools: Defender / CrowdStrike / SentinelOne
  • Log analysis, packet captures, forensic investigation fundamentals
Microsoft Security
  • Defender suite: Endpoint, O365, Identity
  • Azure AD / Entra ID security
  • Conditional Access, M365 identity protection signals
  • M365 Secure Score remediation
Vulnerability Management
  • Tools such as Tenable, Pentera, Varonis, Secure Score
  • Experience coordinating remediation with technical teams
Frameworks & Security Models
  • MITRE ATT&CK, OWASP Top 10
  • Exposure to zero-trust principles
  • Understanding of encryption, certificate management, secrets management
Scripting & Automation
  • PowerShell (essential)
  • Python or Bash desirable
  • Security automation experience (policy enforcement, scanning, rule tuning)
Experience Level
  • 4–5 years in SecEng / SOC / IR roles
  • Experience in regulated environments beneficial but not essential
Nice to Haves (Not Essential but a Bonus)
  • Terraform / Ansible (desirable, not required)
  • Cloud security exposure (Azure, AWS, GCP)
  • Threat intel platform experience
  • Experience tuning SIEM/SOAR playbooks
  • CI/CD pipeline security (GitHub Actions, Jenkins, GitLab)
  • Digital forensics knowledge
  • Certifications: Security , CySA , GCIH, GCIA, CISSP, CISM, OSCP, CCSP
If you’re looking for a role where you can respond to real threats, engineer lasting fixes, and shape security standards, reach out for a confidential conversation
Apply now
Consultant
San Doan
Technology
Change

San
Doan

Divisional Director

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