A unique place to grow your career

At Sellafield Ltd, we are harnessing our expertise; bringing together world-class skills and innovative technology to solve complex nuclear, infrastructure, and engineering challenges. By joining Sellafield Ltd, you join an amazing team of people, from all walks of life, where you can thrive in a connected, considerate culture of innovation, collaboration, and community; and play a significant part in the UK’s sustainable nuclear future.

The challenges we face are amongst the most complex anywhere in the world. We are using advanced technologies to shape, create and advance the world’s nuclear decommissioning knowledge and capability. That’s why our work is driven by people with a passion for problem-solving and innovation.

About the role

We’re building our Cyber Assurance capability and are looking for talented cyber professionals to join us across a range of levels, from Cyber Assurance Advisors through to Principal Advisors. These roles sit within a maturing cyber security function in a highly regulated, safety and mission critical environment here at Sellafield. We are looking to recruit talented and passionate cyber professionals who are looking to make a real impact in developing cyber capabilities in-house.

Our Cyber Assurance team provides independent second-line assurance across key domains including Information Technology (IT), Operational Technology (OT), Technical Architecture and Supply Chain Security.

Working in a highly regulated environment, you’ll help provide confidence that cyber security risks are being effectively identified and managed, that controls remain fit for purpose, and that regulatory and organisational requirements continue to be met. Whether you’re developing your assurance career or already operating as an experienced assurance professional, you’ll play an important role in protecting nationally important assets, services and operations.

We invest heavily in our people and offer a wide range of training, development and career pathways to help our staff build deep expertise in their chosen field. As part of the team, you’ll be working on the largest nuclear decommissioning programme in Europe, providing exposure to a scale, complexity and variety of work that is difficult to find elsewhere.

Key responsibilities

Depending on the role level, responsibilities may include:
• Planning, coordinating, and delivering cyber assurance activities across IT, OT, technical architecture, and supply chain environments.
• Conducting cyber control testing, evidence reviews, risk-based assessments, and control effectiveness reviews.
• Identifying control weaknesses, risks, and opportunities for improvement.
• Producing assurance reports, dashboards, and management information for governance forums and stakeholders.
• Supporting regulatory inspections, audits, and assurance reviews.
• Tracking remediation actions and validating the effectiveness of corrective measures.
• Supporting the development and continuous improvement of assurance methodologies, frameworks, and reporting processes.
• Monitoring emerging cyber threats, regulatory developments, and industry best practice.
• Building strong relationships with stakeholders across ICT, engineering, operational, and supply chain teams.
• Promoting a positive cyber risk culture across the organisation.
• For Principal Advisor roles, leading assurance programmes, developing assurance strategy, mentoring advisors, and providing expert guidance across cyber domains.

Your Skills and Qualifications

• Experience in cyber security, audit, risk management or assurance within a regulated or technical environment.
• Degree or equivalent in cyber security, engineering, or a related field.
• Understanding of cyber security frameworks (e.g., NCSC CAF, ISO 27001, NIST CSF, NIST 800-53).
• Strong attention to detail and ability to follow structured assurance processes.
• Strong analytical, reporting, and stakeholder engagement skills.
• Working toward or holding relevant certifications (e.g., CISA, CISSP, ISO 27001 Auditor, GIAC, CRISC).

Skills considered Desirable:
• Experience in the nuclear or critical national infrastructure (CNI) sector.
• Familiarity with ONR SyAPs, NISR 2003, and HMG SPF.
• Experience with assurance automation or continuous control monitoring.
• Knowledge of risk-based assurance methodologies and tooling.

Why us?

At Sellafield Ltd, we are committed to supporting our employees in fulfilling their potential. With 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 sasra.co.uk
• Learning & Development Opportunities https://careers.sellafieldsite.co.uk/work-with-us/learning-anddevelopment/
• Reward & Recognition Policies
• Welfare & Employee Assistance Programme
• Free Aviva Health App & Annual Health Check
• MyDiscounts – Employee Savings & Discounts
• MyBenefits – A Charity Giving Scheme
• Many, many more! Click this link to visit our Rewards & Benefits page:
https://careers.sellafieldsite.co.uk/work-with-us/rewards-and-benefits/

Additional Information

• The closing date for this vacancy is 26th October 2026.

• In the event of a high number of responses to any advert, Sellafield Ltd reserves the right to close the advert early. Once closed, the advert will be removed from our website. We encourage you to submit your application as soon as possible to avoid disappointment.

• Please regularly check your Spam/Junk folders for news about this vacancy, correspondence could contain invitations to interview and other important updates.

• Qualifications
As part of the application process, you will be asked to provide evidence of your qualifications. Attaching them at application stage will ensure a smooth process and prevent delays.

A minimum of 3 GCSEs at Grade 4/Grade C or above in English, Maths & Science (or equivalent). Functional Skills Level 2 will also be considered as equivalent to GCSE Grade 4 (Grade C). Other equivalent qualifications may be considered.

• Right to Work in the UK
As part of our screening process, all candidates must demonstrate their right to work in the UK.
If you are not a UK national, you will be required to provide evidence of your immigration status. This is generated through the UK Government online service via the GOV.UK services below:
- A valid eVisa (digital immigration status) share code
https://www.gov.uk/evisa/view-evisa-get-share-code-prove-immigration-status
- A Right to Work share code
https://www.gov.uk/prove-right-to-work

Applicants who are not UK nationals must provide a valid Right to Work share code and evidence of their eVisa status at the point of application. Applications submitted without this information are not able to be progressed.

• Please be aware that this role is subject to achieving security clearance. This role requires higher level of National Security Vetting where applicants must typically have 5 or 10 years of continuous residency in the UK. Factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the level of clearance you’re able to achieve.

• Sellafield Ltd are recognised as a Disability Confident Employer (Level 3). Disability Confident employers offer an interview to disabled applicants that meet the minimum criteria for a vacancy. Sellafield Ltd define the minimum criteria as the ‘essential skills’ which are listed on the vacancy notice. Whilst completing your application form, you will be able to indicate if you wish to be considered under the disability confident scheme. If you would prefer to discuss this directly with us, please contact the GBS Recruitment team on recruitment@sellafieldcloud.co.uk