Job Description

Systems & Data Analysts deliver systems management, simulation modelling, advanced data analytics and data science services to support evidence-based decision making across the business. They work closely with stakeholders and provide technical input to aid the development, deployment, implementation and ongoing management of solutions that are safe, secure and drive efficiency.

The role combines responsibility for hosting, configuration, administration and maintenance of business-critical systems, servers and applications with the application of data analytics, operational research and modelling techniques. Systems & Data Analysts analyse datasets, conduct operational research, deploy data science methods, identify root causes, and support operational improvements, technology optimisation and enterprise strategy development.

This is a 9 month opportunity, open to applications from those graded 4B only.

Principal Accountabilities

• Liaise with stakeholders to understand customer needs and agree a clear and bounded scope.
• Understand and optioneer (or support optioneering of) potential solutions considering all factors, delivering conceptual designs and justified solutions that ensure project deliverables are met to time, quality and cost.
• Manage, administer, configure and maintain business-critical systems, servers, databases, applications and hosted environments, ensuring availability, performance, resilience and compliance.
• Support the deployment, upgrade, patching, monitoring and lifecycle management of infrastructure, platforms and applications used throughout the business.
• Develop and implement discrete-event, system dynamics and agent-based models to replicate complex operational environments, test scenarios, evaluate risk and optimise resource allocation for safety-critical operations. This informs capacity planning, workflow optimisation and contingency planning.
• Collaborate with business units, engineering teams, vendors and regulatory bodies to ensure systems and analytical solutions are safe, secure and compliant.
• Develop, configure, maintain and support specialist platforms used throughout the business at a level commensurate with their grade.
• Perform descriptive, diagnostic, predictive and prescriptive analytics on large-scale datasets, applying statistical methods, machine learning algorithms and pattern recognition techniques to uncover trends, risks and anomalies.
• Monitor system performance, availability and security, proactively identifying opportunities for improvement and implementing corrective actions where required.
• Undertake validation, testing and analysis to understand system performance and delivery against agreed requirements and deliverables.
• Apply optimisation techniques (e.g. linear programming, integer programming) to implement and propose improvements that deliver efficiency.
• Support strategy development that aligns with Sellafield’s safety and sustainability objectives by enabling data-driven and technology-enabled decision-making.
• Prepare and check reports for customers, detailing system performance, analytical outputs, findings and recommendations.
• Ensure data integrity, system security and resilience through robust governance, configuration management and cybersecurity practices.
• Provide technical support, troubleshooting and root cause analysis for systems, applications and data services.

Authorities & Dimensions

• Preparation and checking of technical outputs, including but not limited to technical reports, models, system designs, infrastructure documentation and specialist technology solutions, as appropriate for their grade.
• Presentation of technical outputs and recommendations at governance boards at a level commensurate with their grade.
• Develop, configure, validate, test and administer specialist platforms, systems and data used throughout the business, including the production and checking of business-critical models, applications and datasets.
• Support management of hosted environments, server infrastructure, application estates and platform integrations to ensure business continuity and operational effectiveness.

Essential Skills

• SC Clearance.
• A degree, HND/Foundation Degree (Level 5) or equivalent experience in Information Technology, Computer Science, Data Analytics, Mathematics, Engineering or a related STEM discipline.
• Experience supporting, configuring, administering and maintaining business-critical systems, applications, servers or technical platforms.
• Experience gathering requirements, analysing business needs and delivering technical solutions to stakeholders.
• Strong analytical skills, with the ability to acquire, interpret and present data from multiple sources to support decision-making.
• Experience of system administration, troubleshooting, testing, change control and problem resolution.
• Strong communication skills with the ability to explain technical concepts to both technical and non-technical audiences and produce clear technical documentation.

Desirable Skills

• Experience administering Microsoft SQL Server, PostgreSQL or other enterprise databases.
• Experience supporting analytics, modelling, simulation or business intelligence platforms.
• Knowledge of data science, statistical analysis, data visualisation or operational research techniques.
• ETL, automation and data integration tools (e.g. Alteryx, FME, Power Platform).
• Experience supporting cloud-hosted, virtualised or hybrid infrastructure environments.
• Knowledge of SharePoint administration, governance and collaboration platforms.
• Working knowledge of Sellafield operations, business processes or regulatory environments.

Additional Information

• Open VN
• Number of Vacancies: 1
• Contact: Dean Dawson

The informal discussions for this vacancy are expected to be 27th November 2026.

ASW’s may have the right to apply for internal Sellafield Ltd vacancies. Please note if you are an Agency Supplied Worker you are required to attach evidence of all qualifications obtained to support your application. We require a minimum of A*-C (9-4) GCSE in English Language, Maths & Science/IT or equivalent / higher qualification.

Contracted Supply Workers (CSWs) are not eligible to apply to internal vacancies. CSWs are welcome to apply to external vacancies advertised on our external vacancies board.

This is a 9 month opportunity where only applications from candidates at grade 4B will be considered. The anticipated start date for the successful candidate is 11th January 2027. Line manager approval must also have been sought to ensure candidates can be released from their current role.

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.

The closing date for this vacancy is 16th November 2026.