Senior Cyber Security Analyst

TN United Kingdom; Reading; Hybrid; GBP 59,000 - 70,000; Full time

Job summary

Join a forward-thinking company as a Senior Cyber Security Analyst, where you'll play a pivotal role in safeguarding digital assets. Your expertise will be essential in monitoring and responding to cyber threats, optimizing security operations, and collaborating with various teams to enhance security posture. This role offers a hybrid working environment, competitive salary, and a chance to contribute to significant risk reduction initiatives. If you're passionate about cyber security and eager to make a meaningful impact, this is the perfect opportunity for you.

Benefits

26 days holiday per year

Generous Pension Scheme

Health MOTs

Physiotherapy

Counselling

Cycle to Work schemes

Shopping vouchers

Life assurance

Qualifications

• Minimum of 3 years in a technical cyber security role.
• Experience with SIEM tools and incident response.
• Strong knowledge of IT infrastructure and networking.

Responsibilities

• Investigate security alerts and respond to incidents.
• Engage with stakeholders to communicate cyber risks.
• Monitor and enhance performance of SecOps tools.

Skills

Incident Triage

Cyber Security

Communication Skills

Threat Hunting

Risk Management

Education

Degree in Cyber Security

Microsoft Security Certifications

Cyber Security Certifications (CISSP, CISM, CCSP)

Tools

Microsoft Sentinel

PAM

MFA

SIEM Tools

Job description

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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, while 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 the delivery of continuous improvement and risk reduction initiatives. You’ll also contribute to readiness for significant incidents 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 to drive remediation.
• Stakeholder Engagement: Work closely with technology and business teams to communicate cyber risks, recommend actions, and ensure proportionate implementation of controls.
• Tool Performance & Optimization: Monitor and enhance the performance of SecOps tools such as Microsoft Sentinel, PAM, and EDR/XDR systems, including alert tuning and automation.
• SOC Support & Escalation: Act as a key contact and escalation point for the SOC team, providing guidance and mentoring to support operational effectiveness.
• 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.
• Threat Hunting & Continuous Improvement: Perform proactive threat hunting, recommend new security controls, and contribute to continuous improvement of SecOps processes.
• 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 – Flexible working with travel to Thames Water offices as required

Working Pattern: Full Time / 36 Hours per week

What you should bring to the role:

Essential Experience:

• Minimum of 3 years in a technical cyber security role, ideally within a large enterprise
• Experience working in or with a Security Operations Centre (SOC)
• Structured approach to incident triage and issue resolution
• Experience remediating cyber risks in complex digital environments
• Working 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, particularly Microsoft Sentinel
• Ability to write and tune Kusto Query Language (KQL) queries
• Hands-on experience with PAM, MFA, and other SecOps tools
• Excellent communication skills with the ability to explain technical issues to non-technical stakeholders

Desirable Skills & Qualifications:

• Microsoft Security certifications (e.g., SC-200, AZ-900)
• Cyber security certifications such as CISSP, CISM, or CCSP
• 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 range up to £70,000 per annum.
• Annual Leave - 26 days holiday per year increasing to 30 with the length of service (plus bank holidays).
• Generous Pension Scheme through AON.
• Access to benefits to support your health, wellbeing, and finances, including health MOTs, physiotherapy, counselling, Cycle to Work schemes, shopping 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. We aim to build a better future for all, supporting our customers, communities, people, and the planet. We’re looking for passionate, skilled individuals committed to making a difference and helping us achieve our goals.

Learn more about our purpose and values

Working at Thames Water

Thames Water offers a rewarding, diverse workplace where every day presents new opportunities. Enjoy fast-tracked career growth, flexible working, and excellent benefits. Whether in call centres or science labs, we seek people passionate about making a difference.

If you want a sustainable, impactful career that benefits millions and protects water resources, join us. We support your growth every step of the way. Together, we can build a better future for our customers, region, and planet.

Real purpose, support, and opportunities await. Join the Thames Water family. Learn more about why to choose us.

We are committed to diversity and inclusion, welcoming applications from everyone and providing support throughout the recruitment process. We aim to remove barriers to success. Need assistance? We’re here to help.

During crises, we rally to support our customers. Join Team Thames as an ambassador—full training provided. It’s a rewarding experience to learn more about our business, meet colleagues, and earn extra money.

Disclaimer: Due to high application volumes, the advert may close early. We encourage you to apply promptly.