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

Sellafield are currently looking to expand their Human Factors capability, you will join an established but developing team and will have responsibility for leading and shaping the provision of Human Factors assessment and advice across Safety Case, Design Engineering, Commissioning and Operations contexts.

Assessors will be working directly for the Head of Human Factors in delivering and overseeing Human Factors deliverables; predominantly across the lifecycle of the Nuclear Safety Case as well as providing advice in other sectors such as design, COMAH, DSEAR, Security and investigations.

The assessment and advice should be delivered in a fit for purpose, proportionate manner which achieves company safety standards and quality arrangements, and you will proactively seek and implement improvements and share learning across teams and within the wider capability. The work will require the successful candidates to work alongside and support less experienced Assessors while also having the opportunity to learn from more experienced personnel who help us deliver high quality Human Factors work.

Due to the nature of the role and working environment, we are ideally looking for candidates who have experience working in high hazard environments and familiar with the kind of challenges this creates, but also keen to speak with candidates from a varied background.

Key responsibilities

• Develop and deliver Human Factors Assessments and supporting documentation in accordance with Sellafield Limited’s Safety Case Arrangements to ensure Nuclear Safety, legal compliance and efficient and effective operations and project delivery throughout all lifecycle stages.
• Use specialist knowledge to provide expert advice to internal and external stakeholders to ensure Nuclear Safety and support continuation of operations and mission critical projects.
• Contribute to assurance and governance activities to ensure validity of technical approach, the role of the operator has been appropriately considered, process and methodologies have been appropriately applied and arguments made are suitably underpinned and evidenced to enable Nuclear Safety.
• Ensure internal and external stakeholder engagement (at varying levels of seniority) to secure stakeholder support and build confidence in any proposed approach.
• Seek and share learning (internal to the profession, within the wider business and external to the business) to identify any opportunities for improvement or innovation in how we approach Human Factors assessments/ deliverables .
• Maintain a broad awareness of business and profession drivers in order to ensure Human Factors Assessments align with current business needs, context and strategic drivers. Challenging approaches when necessary to achieve a Safety Case that best enables the mission.
• Assist in the development, maintenance, assurance and optimisation of SL’s Nuclear Safety Case arrangements (specific to Human Factors) to ensure that arrangements reflect industry relevant good practice and are flexible enough to enable the mission (for example- by providing learning, experience and technical opinion on the arrangements and at times, leading on the development of methods/ processes/guidance).
• Support the development and maintenance of the capability for the Human Factors discipline to ensure a healthy pipeline of technical resources for the future (for example by acting as a mentor/ inputting in to training and briefing).

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:

• BSc in Psychology/Ergonomics/Human Factors OR Masters degree in either subject.
• Technical or registered member of the CIEHF.
• Experience in performing quality assurance checks on safety case and HF documentation.
• Experience of the application of psychological and ergonomic theory to determine and apply appropriate HF activities, methods and compile arguments and evidence in support of Investigations, Safety Case, Design of user interfaces, equipment, workspaces and environments, Commissioning and Operations.
• Experience of the delivery of a proportionate scope of HF activities for all types of design and/or safety case projects or modifications. This may include leading HF work scopes involving multiple HF specialists.
• Comprehensive understanding and experience in the proportionate application of HF methods and tools in supporting the Safety Case, Engineering and Operations including quantitative and qualitative HRA, walkthroughs, task and error analysis, design review.
• Comprehensive experience and understanding of Safety Case, Projects, Design Engineering and Commissioning processes and methods.
• Experience of dealing with internal and external stakeholders and regulators.
• Ability to plan and manage workload effectively.
• Strong written and verbal communication skills and ability to produce structured, high quality technical output.

Skills considered desirable:
• Understanding of UK nuclear regulatory environment and legislation – HASWA, Management of H&S at Work Regs, Nuclear Installations Act, IRR and experience in regulatory interactions.
• Knowledge of the Sellafield Ltd site, hazards posed, organisational structure, and processes.
• Experience in coaching / developing team members.

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 Tuesday 7th April 2026.

During the interview, you will also be expected to give a 10-minute presentation and 5-minute Q&A.

Presentation title – “Explain a package of work that you have completed and how you approached it.”

This presentation should be sent to recruitment@sellafieldcloud.co.uk via email at least two working days before your interview. You should also take four paper copies of your presentation to your interview in case of any IT issues on the day.

• 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.

• 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.

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

• 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

• 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.