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Security Architect

Job in Neath, Neath Port Talbot, SA11, Wales, UK
Listing for: SELLAFIELD LIMITED
Full Time position
Listed on 2026-02-16
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
Job Description & How to Apply Below

About the role

We are seeking Architects of varying levels of experience, who are looking to develop a specialist career in Cyber. These roles sit within a maturing cyber security function in a highly regulated, safety and mission critical environment here  are looking to recruit talented and passionate Architects who are looking to make a real impact in developing cyber capabilities in-house.

The Security Architects will take responsibility for ensuring that cyber security is embedded by design into Digital, Enterprise, and Operational Technology systems. The roles will support the development and implementation of security architectures and standards across the organisation, delivering expert technical input and advising projects and programmes to reduce cyber security risk. Working across the three areas (Enterprise, Security, and OT), these roles will provide critical input to protect sensitive systems, data, and infrastructure in a nuclear-regulated environment.

We are looking for a variety of skills to support us with our Mission, so whether you are a seasoned Security Architect or have a background in Solutions or Network Architecture with some understanding of cyber security and experience of working in regulated environments, we'd love to hear from you!

We invest heavily in our people and offer a variety of training / career pathways to truly develop our staff supporting them to become true experts in their field, and we are working on the biggest decommissioning site in Europe, meaning that the scope and variety of work is truly incredible.

Key responsibilities
  • Support the development and implementation of security architectures and patterns aligned to enterprise strategy, regulatory expectations and control standards.
  • Provide technical guidance and assurance on cyber security design during project and solution delivery.
  • Translate business and technical requirements into secure architectural designs.
  • Collaborate with Enterprise, Solution and OT Architects to ensure security is integrated into all designs.
  • Assist in defining and maintaining security standards, guidelines, and reference architectures.
  • Participate in technical design authorities and review boards, representing cyber security concerns.
  • Keep abreast of emerging cyber threats and technologies to provide forward-looking security architecture advice.
  • Provide clear and actionable cyber security advice to a range of technical and non-technical stakeholders.
  • Support risk assessments, threat modelling and security control selection.
  • Champion a 'Secure by Design' approach across ISO/ICT.
Your

Skills and Qualifications

We are looking for a range of skills and knowledge for these positions, so please apply if you have most or some of the experience below:

  • Degree or equivalent experience in cyber security, information systems, or a related technical field.
  • Knowledge of enterprise IT systems, networks, cloud platforms (e.g. Azure), and associated security practices, with a familiarity with secure design principles and architecture frameworks.
  • Proven track record in security architecture or secure systems engineering within complex IT or OT environments with the ability to create and articulate technical security designs for diverse stakeholders.
  • Understanding of cyber risk principles and security controls relevant to the chosen pillar.
  • Strong understanding of threat modelling, secure architectures, and assurance processes.
  • Experienced in delivering secure by design within a regulated environment (ideally nuclear, critical national infrastructure, or defence).
  • Strong working knowledge of architecture frameworks (e.g. TOGAF, SABSA, or equivalent).
  • Strong written and verbal communication skills, with the ability to explain complex topics clearly.
  • Experience of working with stakeholders at multiple levels to influence design decisions.
  • Awareness of regulatory and industry frameworks (e.g. CAF, NIST, CIS and NIS Regulations).
Why us?

At Sellafield Ltd, we are committed to supporting our employees in fulfilling their potential. With having 100 years of work in front of us, we offer comprehensive training and development opportunities, enabling you to feel inspired in your role. Whatever area you join us in, you'll find a genuinely exciting and rewarding career.

Making sure our employees feel supported is important to us. Therefore, to help you get the most out of life in and outside of work, we also offer a range of employee benefits:

  • You will benefit from an annual bonus of up to 10% - 15%, made up of company and personal performance
  • An attractive defined contribution pension scheme - the company will match up to 13.5% for a 7% employee contribution!
  • 30 days annual leave + bank holidays. Plus, the ability to purchase an extra 2.5 days per year.
  • The ability to carry over 10 days annual leave each financial year
  • Paid Sick Leave
  • Family Friendly Policies - Visit our Rewards & Benefits page to read more
  • Cycle to Work Scheme
  • Lifestyle Benefits
  • Learning & Development Opportunities
  • Reward &…
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