Security Architect (Sizewell C)

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Security Architect
Sizewell C
 

Location: Based in London on a hybrid basis with travel to Suffolk as required.   
Contract: Permanent, full-time. 
Salary:  Circa £80,000 dependant on experience, plus benefits 
Closing Date: 17th September 2026
 

Benefits include: 

Salary: Competitive (depending on experience) 
Bonus: 5% annual target 
Holiday: 28 days + bank holidays 
Pension: Market-leading (up to 7.5% employee / 15% employer) 
Benefits: Health cover, cycle-to-work scheme, discounts & more 
Hybrid working & ongoing professional development  
 

About the Role

We are seeking an experienced Security Architect to lead the design and governance of secure technology solutions across the Sizewell C organisation. Working within a highly regulated and safety critical environment, you will ensure that security is embedded into systems, infrastructure, cloud platforms, applications, and operational technology from inception through delivery.

You will collaborate with Cyber Security, Enterprise Architecture, Engineering, Infrastructure, Digital, and third-party suppliers to define security standards, assess risk, and support the delivery of resilient and compliant technology solutions.
 

About You
 

Proven experience in a Security Architect or senior cyber security role within large, complex organisations
Extensive knowledge of security architecture frameworks, cloud security principles across Azure and/or AWS, network and infrastructure security, Identity and Access Management (IAM), Zero Trust and secure access models, and security monitoring and threat management technologies.
Experience designing secure enterprise and operational technology environments
Knowledge of cyber security standards and frameworks such as ISO27001, NIST, CIS, or IEC 62443
Strong stakeholder management and communication skills
Ability to balance security, operational, and business requirements
 

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. 

For this role you must have evidence of right to work in the UK. As a project, we do not discriminate on the grounds of age, gender, race, colour, religion, disability or sexual orientation, and we welcome applications from all sections of the community.