Job Description

Joining the Operational Security Team offers a unique opportunity to work at the forefront of protecting critical systems and services that people rely on every day in the nuclear industry. This role places you directly in the operational security environment, where your actions have real, immediate impact detecting threats, responding to incidents, and helping maintain the resilience and security of essential infrastructure.

It is an excellent opportunity for individuals looking to develop or deepen their cyber security expertise in a practical, hands-on setting. You will gain exposure to real world security events, modern tooling, and evolving threat landscapes, building skills that are highly valued across the industry.

Beyond technical development, you will be part of a collaborative and mission driven team, working alongside experienced professionals who are committed to continuous learning and improvement. The environment encourages curiosity, critical thinking, and proactive problem-solving qualities that are essential in today’s cyber security landscape.

For those motivated by purpose, challenge, and professional growth, this role offers a chance to make a meaningful contribution while building a rewarding and future proof career.

Principal Accountabilities

We are looking for motivated and curious individuals who have a strong interest in cyber security and a desire to work in a high consequence, operational environment. You do not need to be an expert, but you must bring the right mindset, integrity, work ethic and willingness to learn.

Ideal candidates will:

• Demonstrate a genuine interest in cyber security, technology, and emerging threats
• Be proactive, inquisitive, and willing to challenge and investigate anomalies
• Remain calm and methodical when working under pressure
• Have strong analytical and problem-solving skills, with attention to detail
• Communicate clearly and effectively, both written and verbal
• Work well as part of a team, contributing to a collaborative and supportive environment
• Show a strong commitment to nuclear safety, security, and compliance.

Some experience in IT, or security is advantageous, but equally important is the right attitude and a willingness to develop. This role would suit individuals looking to transition into cyber security, as well as those seeking to build on existing experience in a more operational and mission-focused setting.

If you are interested in applying, please ensure you have informed your line manager, they are willing to release you and that you are currently at the correct substantive grade for this opportunity.

Knowledge & Experience

Essential Skills

Desirable Skills

Additional Information

• In Profession EOI
• Contact/s: Gordon Fletcher – gordon.fletcher@sellafieldsites.com

The informal interviews for this EOI are expected to take place on 19th May 2026.

If you choose to apply for this role and your application is shortlisted by the hiring manager, you will be invited to a competency based informal interview. In the interview, you will be assessed against the below competencies:

Behavioural:
1. Commitment to Standards 3.1.5
2. Collaboration & Teamwork 3.1.6

Technical:
1. Management of Safety 31.2
2. Improving Individual & Team Performance 37.7

Please see link to the competency framework for further information:
https://slportal.ssa-intra.net/pub/SC001/00027/Competency%20Framework/Forms/AllItems.aspx

If your technical competency is not in the above framework, please refer to the profession’s share point page for further information.

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 ensure that you save a copy of this advert for future reference if you make an application for this role.

Please note this EOI is only available to individuals in the ISO profession who are a permanent at 4B.

Please ensure that you have discussed your intention to apply with your line manager and that they have confirmed that you will be released to take up the role.

The closing date for this vacancy is 3rd May 2026.

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