Senior Cyber Security Analyst

idibu; Reading; Hybrid; GBP 59,000 - 70,000; Full time

Job summary

A leading company in the water and wastewater sector is seeking a Senior Cyber Security Analyst to enhance digital defenses. This role involves monitoring cyber threats, optimizing security tools, and collaborating with stakeholders. The ideal candidate will have extensive cybersecurity experience and strong communication skills. The position offers a hybrid working model, competitive salary, and a comprehensive benefits package.

Benefits

26 days holiday, increasing to 30 with service

Generous pension scheme via AON

Health MOTs

Physiotherapy

Counselling

Cycle to Work

Life assurance

Qualifications

• Minimum of 3 years in a technical cybersecurity role.
• Experience working in or with a Security Operations Centre (SOC).

Responsibilities

• Investigate security alerts and respond to incidents.
• Collaborate with technology and business teams.
• Conduct proactive threat hunting.

Skills

Communication

Cybersecurity

Incident Response

Stakeholder Engagement

Threat Hunting

Education

Degree in Cyber Security

Degree in Computer Science

Tools

Microsoft Sentinel

Kusto Query Language

PAM

MFA

Job description

As a Senior Cyber Security Analyst, you will play a critical role in strengthening Thames Water’s digital defenses by maintaining and optimizing security operations tools and processes. You’ll focus on monitoring, analyzing, and responding to cyber threats, supporting the SOC team, and ensuring effective incident management across the business.

Your role will involve collaborating with technology and business stakeholders, investigating security alerts, enhancing tooling performance, and supporting continuous improvement and risk reduction initiatives. You’ll also contribute to incident readiness and play a key role in proactive threat hunting and compliance reporting.

What you’ll be doing as a Senior Cyber Security Analyst:

• Security Incident Response: Investigate security alerts from SIEM and third-party MSSPs, triage and respond to incidents, and support root cause analysis for remediation.
• Stakeholder Engagement: Collaborate with technology and business teams to communicate cyber risks, recommend actions, and implement controls.
• Tool Performance & Optimization: Monitor and improve SecOps tools such as Microsoft Sentinel, PAM, and EDR/XDR, including alert tuning and automation.
• SOC Support & Escalation: Serve as a key contact and escalation point, providing guidance and mentoring to the SOC team.
• On-Call & Incident Readiness: Participate in a 24/7/365 on-call rota with MSSP partners, supporting out-of-hours investigations and maintaining readiness.
• Threat Hunting & Continuous Improvement: Conduct proactive threat hunting, recommend new security controls, and improve SecOps processes.
• Compliance & Documentation: Maintain security documentation, support GDPR, NIS, ISO 27001 compliance, and report operational metrics.

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:

• Minimum of 3 years in a technical cybersecurity role, preferably within a large enterprise
• Experience working in or with a Security Operations Centre (SOC)
• Structured approach to incident triage and resolution
• Experience remediating cyber risks in complex environments
• Experience with third-party security partners or MSSPs

Essential Technical Skills & Qualifications:

• Strong knowledge of IT infrastructure, networking, and end-user computing
• Experience with SIEM tools, especially Microsoft Sentinel
• Proficiency in writing and tuning Kusto Query Language (KQL) queries
• Hands-on experience with PAM, MFA, and other SecOps tools
• Excellent communication skills for explaining technical issues to non-technical stakeholders

Desirable Skills & Qualifications:

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

What’s in it for you?

• Salary up to £70,000 per annum
• 26 days holiday, increasing to 30 with service, plus bank holidays
• Generous pension scheme via AON
• Benefits supporting health, wellbeing, and finances, including health MOTs, physiotherapy, counselling, Cycle to Work, vouchers, and life assurance

Find out more about our benefits and perks.

Who are we?

We’re the UK’s largest water and wastewater company, serving over 16 million customers daily. Our mission is to build a better future for all by helping our customers, communities, people, and the planet thrive. We seek passionate, skilled individuals committed to making a difference and achieving our long-term goals.

Learn more about our purpose and values

Working at Thames Water

Thames Water offers a diverse, rewarding environment where you can make a difference daily. We provide fast-tracked career opportunities, flexible working, and excellent benefits.

Whether in call centres or science labs, we look for passionate people eager to improve. Join us if you want a sustainable, meaningful career impacting millions and protecting water resources for future generations.

We promote diversity and inclusion, removing barriers to success and offering support throughout recruitment. We also provide opportunities to support customers directly as part of our crisis response, with full training and extra earning opportunities.

Note: Due to high application volume, we may close the advert early. Apply promptly to avoid missing out.