Job Description

The Transition Delivery Manager is responsible for managing the delivery of high impact organisational ICT change initiatives “special projects”, involving multiple projects, teams and stakeholders on behalf of the Chief Digital Information Officer (CDIO). This involves working collaboratively to define, design, manage and delivery projects that will have an impact across the department, Sellafield Ltd. and the NFA Group. The projects will include advancing modern ways of working across the company and within ISO ensure that the department’s operating model is integrated effectively to drive value for the company.

The role supports the delivery of enhancements to existing services and the introduction of new services being delivered by multiple teams, ensuring they are technically robust, operationally viable, and sustainable. It plays a key role in maintaining service continuity, reducing risk, and ensuring that services are embedded effectively into ISO business-as-usual operations. The initiatives are aimed at, but not limited to, advancing modern ways of working, reducing shadow IT across the enterprise and delivering greater alignment with NDA Group ICT.

Principal Accountabilities

• Manage the full lifecycle of ICT change activities, from initial planning through to early life support.
• Develop business cases and rationale for change for special projects, reflecting value delivered, costs and risks.
• Oversee the management of interdependencies, constraints, and risks across ISO/ICT special projects, developing mitigations when required.
• Establish mechanisms to reinforce and embed changes, ensuring benefits delivered are sustainable.
• Manage dependencies of varying complexity, potentially planning and feeding into larger programmes and portfolios
• Remove blockers and manage risks, commercials, budgets and people
• Have an awareness of the bigger picture
• Develop and implement structured change management strategies and plans
• Identify and engage key stakeholders across the organisation.
• Build strong relationships to support change adoption and minimise resistance.
• Assess the impact of change on people, processes, and systems.
• Design and deliver targeted communication plans to support awareness and understanding.
• Define and track KPIs and use insights to refine approaches and ensure continuous improvement.

Authorities & Dimensions

• Provide expert advice on transition strategy, standards, and best practices.
• Authority to shape strategic sourcing, architecture alignment, and supplier onboarding.
• New services, applications, infrastructure, and suppliers.
• High-impact changes (e.g., Tier 1 systems, 500+ users).
• Multi-supplier environments (10+ suppliers).
• Enterprise-wide influence across all IT service domains and supplier ecosystems.
• Responsible for ~5 million budget
• Matrix management of resources

Essential Skills

• Proven experience in IT Service Transition and ITIL-based environments.
• Demonstrable experience in leadership and team management roles delivering organisational change, including business change or business readiness activities.
• Demonstrable experience in stakeholder management, working with multiple internal and external groups at senior/executive level
• Experience working in multi-supplier, complex IT environments.
• Strong stakeholder engagement and communication skills.
• Experience with service management toolsets and operational readiness assurance.
• Demonstrable experience in strategic leadership, supplier management, and commercial engagement.
• Prior accountability for budget or financial management responsibilities.
• Collaboration: solve and unblock issues between teams or departments at the highest level
• Identify and challenge organisational processes of increasing complexity and those processes that are unnecessarily complicated
• Planning ability lead a continual planning process in a very complex environment

Desirable Skills

• Previous experience in project management and/or a recognised industry standard accreditation, for example PRINCE2, Agile PM, or equivalent project management qualifications.
• TOGAF or equivalent enterprise architecture certification (Level I).
• Experience in regulated, high-security, or critical infrastructure environments.
• Previous experience building and working with cross-functional teams and/or matrixed resources.
• Previous experience working with the NDA group.
• Understanding of Sellafield Ltd, including its operations and ICT estate or equivalent.

Additional Information

• Open VN
• Number of Vacancies: 2
• Contact/s: Ian Haslam

The interviews for this vacancy are expected to take place on Friday 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.

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 interview. In the interview, you will be assessed against the below competencies:

Behavioural:
1. Collaboration & Teamwork 3.1.6
2. Problem Solving 3.1.3
3. Drive for Results 3.3.1

Technical:
1. Using IT at Work 31.3
2. Driving & Facilitating Change 37.6

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.

During the interview, you will also be expected to give a 10 minute presentation describing your approach to managing a complex business transition. Please cover:
1. How you would initiate and mobilise the transition.
2. How you would plan and control delivery.
3. How you would identify and manage risks, assumptions, issues and dependencies.
4. How you would engage stakeholders and secure commitment.
5. How you would monitor progress and report status.
6. How you would determine readiness for implementation/go-live.
7. What actions you would take if delivery fell behind plan.

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.

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 Monday 9th November 2026.