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 NDA 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.

Please note this vacancy is only open to those who are in the ISO profession at the same grade.

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.
• 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.

Role authorities and dimensions

• Authority to shape strategic sourcing, architecture alignment, and supplier onboarding.
• New services, applications, infrastructure, and suppliers.
• 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, AgilePM, 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 be on 8th June.

Please note this vacancy is only open to those who are in the ISO profession at the same grade.

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.

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:
Problem Solving
Collaboration and Teamwork
Drive for Results

Technical:
Change and transformation

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.

The closing date for this vacancy is 24th May 2026.