OT Cyber Security Analyst

THAMES WATER UTILITIES LIMITED; United Kingdom; On-site; GBP 50,000 - 65,000; Full time

Job summary

An established industry player is seeking a highly skilled OT Senior Cyber Security Analyst to join their Security Operations team. This role is crucial in protecting critical infrastructure for millions of customers across the UK. You will be responsible for maintaining SecOps solutions, mentoring the SOC team, and managing OT alerts. The ideal candidate will have a deep understanding of SecOps, incident management, and threat detection, alongside strong communication skills to collaborate with cross-functional teams. Join this innovative firm to make a significant impact on security and compliance in the water sector.

Benefits

26 days holiday, increasing to 30

Pension scheme

Health and wellbeing benefits

Qualifications

• 3+ years of experience with cyber security controls in enterprise environments.
• Familiarity with OT infrastructure and networking.

Responsibilities

• Lead incident triage and response; improve management processes.
• Maintain security operations and ensure continuous improvement.

Skills

Cyber Security Controls

Incident Management

Threat Detection

Communication Skills

Collaboration Skills

Education

Degree in Related Fields

Security Certifications (Microsoft SC-200, AZ-900, CCSP)

Tools

Microsoft Sentinel

SOAR

EDR/XDR

PAM

KQL

NAC

Firewalls

IDS/IPS

Job description

We are seeking a highly skilled and experienced OT Senior Cyber Security Analyst to join our Security Operations team at Thames Water. As the UK's largest water company, we are committed to ensuring security and compliance, protecting critical infrastructure for 15 million customers.

This role involves maintaining SecOps solutions, controls, and processes, mentoring the SOC team, and managing OT alerts and incidents. You should have a deep understanding of SecOps, IT, and OT environments, with skills in incident management, threat detection, and security improvement. Strong communication and collaboration skills are essential for working with cross-functional teams to mitigate risks.

Key Responsibilities

1. Contextualise OT Threats: Understand OT estate, threats, controls; analyse network traffic using tools like Claroty; collaborate with Operations teams.
2. Maintain Security Operations: Ensure continuous improvement in security processes; support tools such as Microsoft Sentinel, SOAR, EDR/XDR, and PAM; reduce alert fatigue and improve incident resolution times.
3. Proactive Risk Remediation: Identify and evaluate risks; perform threat hunting; demonstrate risk reduction through metrics.
4. Incident Response: Lead incident triage and response; improve management processes; educate staff on incident reporting.
5. Continuous Improvement: Drive automation and process enhancements; track KPIs and reporting to demonstrate improvements.

Key Relationships

Engage with CISO, OT and IT teams, Security Managers, Business Stakeholders, and Service Owners.

Minimum Requirements

• At least 3 years' experience with cyber security controls in enterprise or critical infrastructure environments.
• Experience with control systems like ICS, SCADA, CNI.
• Exposure to SOC operations; incident triage; risk remediation.
• Technical skills: familiarity with OT infrastructure, networking, KQL, Microsoft Sentinel, MFA, PAM, SIEM.

Preferred Qualifications

• Knowledge of network security tools (NAC, firewalls, IDS/IPS).
• Leadership experience; degree in related fields; security certifications such as Microsoft SC-200, AZ-900, CCSP, or OT-specific certifications.

Benefits

• Salary up to £65,000 depending on experience.
• 26 days holiday, increasing to 30; pension scheme; various health and wellbeing benefits.

About Thames Water

We are the UK's largest water and wastewater company, committed to building a better future. We offer diverse career opportunities, flexible working, and inclusive environment. Join us to make a difference and help protect water resources for future generations.