Full 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

If this sounds like the next step in your career, we’d love to hear from you. Apply today.
When joining Sizewell C, you may wonder why you are contacted by colleagues with an EDF email or see the EDF logo on portals that you access and/or documentation you receive; this is because we have partnered with EDF for the provision of a number of support services whilst we complete a successful transition out of the EDF group.
At Sizewell C we encourage and embrace diversity and how it can improve our experience