OT Cyber Security Analyst

Pertemps; Reading; On-site; GBP 55,000 - 65,000; Full time

Job summary

An established industry player is looking for a highly skilled OT Senior Cyber Security Analyst to join their Security Operations team. This pivotal role involves maintaining SecOps solutions and mentoring the SOC team while managing OT alerts and incidents. The ideal candidate will possess a deep understanding of SecOps, IT, and OT environments, focusing on incident management and threat detection. With a commitment to continuous improvement and collaboration with cross-functional teams, this position offers a chance to make a significant impact on the security posture of critical infrastructure. Join a forward-thinking organization dedicated to building a sustainable future and supporting diverse career opportunities.

Benefits

26 days annual leave

Generous pension scheme

Health and wellbeing benefits

Qualifications

• 3+ years in Cyber Security controls, especially in critical infrastructure.
• Experience in SOC environment and incident triage.

Responsibilities

• Lead incident triage and response to reduce business impact.
• Drive process automation and efficiency in security operations.

Skills

Cyber Security Controls

Incident Management

Threat Detection

Communication Skills

Risk Remediation

Education

Cybersecurity Degree

OT-specific Certifications

Tools

Microsoft Sentinel

Kusto Query Language (KQL)

SIEM Systems

Network Security Tools

Job description

We are seeking a highly skilled and experienced OT Senior Cyber Security Analyst to join our Security Operations team at Thames Water, the UK’s largest water company. This role involves maintaining SecOps solutions, controls, and processes, mentoring the SOC team, and managing OT alerts and incidents.

The ideal candidate will have a deep understanding of SecOps, IT, and OT environments, with responsibilities including incident management, threat detection, and security improvement. Strong communication skills are essential for collaboration with cross-functional teams.

Key Responsibilities

1. Contextualise OT Specific Threats: Understand OT estate, threats, and controls; analyze network traffic with tools like Claroty; build relationships with Operations teams.
2. Maintain Security Operations: Improve security processes; support tools like 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 metrics.
4. Incident Readiness & Response: Lead incident triage and response; reduce business impact; educate staff on incident procedures.
5. Continuous Improvement: Drive process automation and efficiency; track improvements via KPIs and dashboards.

Key Relationships

CISO, Operational Technology Teams, IT Operations, Security Operations Manager, Security Architecture Manager, Cyber Security Programme Manager, Cyber Resilience Manager, Network Operations Manager, Business Change and Engagement, Key Business Stakeholders, Service Owners.

Candidate Requirements

Essential Experience

• Minimum 3 years in Cyber Security controls, preferably in critical infrastructure.
• Minimum 3 years working with control systems like ICS, SCADA, CNI.
• Experience in SOC environment, incident triage, and cyber risk remediation.

Technical Skills & Qualifications

• Ability to communicate complex issues to non-technical audiences.
• Understanding of OT infrastructure and networking.
• Proficiency in Kusto Query Language (KQL) and SIEM systems, especially Microsoft Sentinel.

Desirable Experience & Skills

• Knowledge of network security tools like NAC, Firewalls, IDS/IPS.
• Leadership experience; cybersecurity or related degree; certifications like Microsoft Security Operations Analyst (SC-200, AZ-900), CCSP, OT-specific certifications.

Benefits

• Salary up to £65,000 depending on experience.
• 26 days annual leave, increasing with service, plus bank holidays.
• Generous pension scheme, health and wellbeing benefits, and more.

About Thames Water

The UK’s largest water and wastewater company, serving over 16 million customers. We aim to build a sustainable future, supporting our communities and environment. We offer diverse career opportunities, flexible working, and inclusive culture.

Join us to make a difference in people's lives and help protect water resources for future generations. We value diversity and are committed to supporting all applicants throughout the recruitment process.