Job Specifications
Senior Security Analyst
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.
This is not a one-lane SOC role and not a governance-only position. If you enjoy both incident response and engineering security controls, this one’s for you.
You’ll work across detection, response, vulnerability management, security tooling, M365 security, and infrastructure hardening. Ideal for someone with 4–5 years’ experience who wants real technical ownership — not just alert monitoring.
What You’ll Be Doing
Lead investigations, triage, and containment using SIEM/EDR (Sentinel preferred)
Harden IAM, PIM/PAM, Windows/Linux and identity services
Strengthen M365 security: Defender, Identity Protection, Conditional Access
Run vulnerability scanning & remediation cycles
Improve detection rules, baselines, and security automation
Support compliance (ISO 27001, Cyber Essentials, NIST) and resilience exercises
Drive proactive threat hunting and posture improvements
Essential Experience (Must Haves)
PowerShell (strong scripting & automation)
Microsoft Sentinel or equivalent SIEM (Sentinel strongly preferred)
Hands-on incident response (triage → investigation → containment)
EDR/XDR experience (Defender / CrowdStrike / SentinelOne)
Strong understanding of MITRE & OWASP
Hardening & tooling experience (IAM, PIM/PAM, endpoint/security baselines)
M365/Defender security exposure (Identity, Endpoint, O365)
Vulnerability management tooling (Tenable, Pentera, Secure Score)
4–5 years in security engineering / SOC / incident response roles
Nice to Haves (Not Essential, But a Bonus)
Terraform / Ansible
Azure / AWS / GCP cloud security exposure
Threat hunting & threat intel platforms
CI/CD security (GitHub Actions, Jenkins, GitLab)
Forensics fundamentals
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 drive meaningful security improvements, reach out for a confidential conversation!
About the Company
Arthur is a specialist recruitment consultancy, focusing on the insurance market.
2024 Sunday Times' Best Place to Work
2023 Sunday Times' Best Place to Work
2023 Recruiter Shortlist for Best Recruitment Agency of the Year**
Specialist areas within Insurance:
Underwriting
Broking
Claims
Data Science
Change and Transformation
Risk Management
Catastrophe Modelling and Exposure Management
Actuarial
Compliance
Sales
Audit
Accounting
Finance
IT
Legal
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