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Senior cyber security analyst

Reading (Berkshire)
Thames Water
Cyber security analyst
Posted: 3 July
Offer description

What you’ll be doing

as a Senior Cyber Security Analyst:
1. Security Incident Response: Investigate security alerts from SIEM and third-party MSSPs, triage and respond to incidents, and support root cause analysis to drive remediation.
2. Stakeholder Engagement: Work closely with technology and business teams to communicate cyber risks, recommend actions, and ensure proportionate implementation of controls.
3. Tool Performance & Optimisation: Monitor and enhance the performance of SecOps tools such as Microsoft Sentinel, PAM, and EDR/XDR systems, including alert tuning and automation.
4. SOC Support & Escalation: Act as a key contact and escalation point for the SOC team, providing guidance and mentoring to support operational effectiveness.
5. On-Call & Incident Readiness: Participate in a 24/7/365 on-call rota with our MSSP partners, supporting out-of-hours investigations and maintaining incident readiness.
6. Threat Hunting & Continuous Improvement: Perform proactive threat hunting, recommend new security controls, and contribute to continuous improvement of SecOps processes.
7. Compliance & Documentation: Maintain security documentation, support GDPR, NIS, and ISO 27001 compliance, and collect metrics to report on operational effectiveness and risk posture.

Base Location: Hybrid – With travel to Thames Water offices 2 days per week

Working Pattern: Full Time / 36 Hours per week

What you should bring to the role:

Essential Experience:

8. Minimum of 3 years in a technical cybersecurity role, ideally within a large enterprise
9. Experience working in or with a Security Operations Centre (SOC)
10. Structured approach to incident triage and issue resolution
11. Experience remediating cyber risks in complex digital environments
12. Working with third-party security partners or MSSPs

Essential Technical Skills & Qualifications:

13. Strong knowledge of IT infrastructure, networking, and end-user computing
14. Experience with SIEM tools, particularly Microsoft Sentinel
15. Ability to write and tune Kusto Query Language (KQL) queries
16. Hands-on experience with PAM, MFA, and other SecOps tools
17. Excellent communication skills with the ability to explain technical issues to non-technical stakeholders

Desirable Skills & Qualifications:

18. Microsoft Security certifications (e.g. SC-200, AZ-900)
19. Cybersecurity certifications such as CISSP, CISM, or CCS
20. Degree in Cyber Security, Computer Science, or related field
21. Familiarity with firewalls, IDS/IPS, VPNs, and NAC
22. Experience mentoring or leading SOC analysts

What’s in it for you?

23. Salary range up to £70,000 per annum.
24. Annual Leave - 26 days holiday per year increasing to 30 with the length of service (plus bank holidays).
25. Generous Pension Scheme through AON.
26. Access to lots of benefits to help you take care of you and your family’s health and wellbeing, and your finances – from annual health MOTs and access to physiotherapy and counselling, to Cycle to Work schemes, shopping vouchers and life assurance.

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