Cyber Operations Manager

Sizewell C; City Of London; Hybrid; GBP 70,000 - 95,000; Full time

Benefits offered by this job

Annual leave 28–30 days

Bonus 5%

Pension up to 7.5% employee / 15% boss

Job summary

Sizewell C is recruiting an experienced Cyber Operations Manager to oversee day‑to‑day cyber security operations within a highly regulated and safety‑critical environment. You will manage security monitoring, threat detection, vulnerability management, incident response coordination, and operate across Cyber Security, Infrastructure, Digital, OT, and third‑party providers to protect critical systems and data.

This role requires a strong focus on resilience and regulatory compliance.

Qualifications

• Experience leading cyber security operations in large, regulated organisations.
• Experience managing third‑party cyber security providers and operational service delivery.
• Knowledge of cyber security frameworks such as NIST, ISO27001, CIS, or IEC 62443.
• Strong leadership and communication skills.
• Ability to manage competing priorities within high‑pressure environments.
• Solid understanding of SOC processes, SIEM, threat detection, vulnerability management, and cyber hygiene.

Responsibilities

• Oversee day‑to‑day cyber security operations.
• Manage security monitoring, threat detection, vulnerability management, incident response coordination.
• Coordinate with Cyber Security, Infrastructure, Digital, OT and third‑party providers to ensure controls and services protect systems and data.

Skills

Cyber security operations

Leadership

Stakeholder management

Communication

Prioritisation under pressure

Third‑party security delivery

Education

Cyber security degree

Certifications (relevant)

Tools

SIEM platforms

SOC processes

Threat intel tools

Job description

Sizewell C's business is to design, finance, construct, commission, operate, maintain, and eventually decommission the nuclear power plant and related infrastructure at Sizewell C in Suffolk. Overall, whilst the Company is in the construction phase, the Boards' principal focus is on the development and construction of Sizewell C on time, on budget and to the highest quality and safety standards. The Company is maturing to meet all these requirements.

Sizewell C is economically regulated by OFGEM under the Regulated Asset Base (RAB) model similar to other UK electricity distribution networks and Thames Tideway.

Sizewell C construction strategy is to replicate the design of Hinkley Point C, using the majority of the same supply chain, but innovating in the way it is delivered to achieve savings in time and cost of around 20%. The CCO will need to be guided by and incorporate lessons learned from the Hinkley Point C commercial delivery to achieve Sizewell C's ambition.

Following Financial Completion and Revenue Commencement, Sizewell C is fully funded and is owned by; The Secretary of State for Energy Security and Net Zero representing HM Government, La Caisse, Centrica, EDF and Amber Infrastructure.

Sizewell C is entering an exciting phase of growth as we mature into an independent organisation and continue building one of the UK's largest and most important energy projects. We are now recruiting the below position.

Cyber Operations Manager

Location: Based in London on a hybrid basis with travel to Suffolk as required.

Contract : Permanent, full-time.

Salary: £82,000 per annum, dependant on experience, plus benefits.

Benefits include:

• Annual Leave: 28 days per annum, increasing to 30 days after 5 years of service, plus bank holidays.
• Bonus: 5% annual bonus.
• Pension Contributions: Defined Contribution Pension Scheme with up to 7.5% employee contribution 15% employer contribution.

Closing Date: Monday 21st September 2026

Sizewell C is entering an exciting phase of growth as we mature into an independent organisation and continue building one of the UK's largest and most important energy projects.

About the Role

We are seeking an experienced Cyber Operations Manager to oversee day-to-day cyber security operations within a highly regulated and safety-critical environment.

You will be responsible for managing security monitoring, threat detection, vulnerability management, incident response coordination, and operational cyber resilience activities across the organisation. Working closely with Cyber Security, Infrastructure, Digital, Operational Technology, and third-party providers, you will ensure that cyber security controls and services operate effectively to protect critical systems and data.

This role offers the opportunity to contribute to a nationally significant infrastructure programme where operational resilience and cyber defence are essential.

About You

• Proven experience managing cyber security operations or security operations teams within large, complex organisations
• Experience managing third-party cyber security providers and operational service delivery
• Knowledge of cyber security frameworks such as NIST, ISO27001, CIS, or IEC 62443
• Strong leadership, stakeholder management, and communication skills
• Ability to manage competing priorities within high-pressure operational environments
• Strong understanding of:

• Security Operations Centre (SOC) processes and technologies
• SIEM, endpoint detection, and security monitoring platforms
• Threat detection, threat intelligence, and incident response
• Vulnerability management and cyber hygiene practices
• Network, infrastructure, cloud, and endpoint security
• Cyber security operational governance and risk management

Why Join Us?

• Be part of one of the most important low-carbon energy projects in the UK.
• Work in a mission-driven environment that values innovation, integrity, and long-term sustainability.
• Competitive salary, comprehensive benefits, and opportunities for career development.
• Flexible and hybrid working options.

Behavioural Competences

• Humility
• Recognise the value brought from different cultures and experiences
• Be open to other's points of view and ideas, be willing to debate and to compromise
• Positivity
• Positively challenge poor quality and performance
• Identify solutions at the lowest possible level
• Encourage tier 1s and others to bring new ideas forward
• Respect
• Value the rules and environment in which we operate
• Give and receive feedback with respect
• Embrace and engage with new people and ideas
• Solidarity
• One team, working closely together and helping each other
• Empowered teams always looking forward.
• Shared responsibility for delivery the project outcomes
• Clarity
• Communicate clearly and consistently
• Promote collaboration and team alignment
• Clearer and faster decision making
• Drive simplification at all levels

When joining Sizewell C, you may wonder why you are cont