Assistant Project Manager

Sizewell C is entering an exciting phase of growth as we mature into an independent organisation and continue building one of the UK’s largest and most important energy projects. We are now recruiting for the below position.

Permanent
-Office-based with hybrid flexibility(typically 3 days p/w in the office)

Full time

Bonus: 5% annual incentive
Pension:
Up to 7.5% employee contribution / 15% employer contribution
Holiday: 28 days plus bank holidays

Thursday 5th November 2026

As Assistant Project Manager you will be responsible for supporting the delivery of new business capabilities across Sizewell C (SZC) Nuclear New Builds by collaborating with the Project Manager and IT Programme Manager. They will contribute to Information Systems (IS) Projects and drive activities working according to baselined time, cost, and quality expectations.

As Assistant Project Manager you'll be expected to work pragmatically to make risk-based assessment on when to adhere completely to standards, procedures, and delivery methods and when to proposed controlled deviations to maximise the chance of a successful outcome for SZC. You will be expected to share your assessment with the Project Manager and elevate any emerging risks.

The successful candidate will engage actively with SZC Internal Departments to ensure compliance and understanding of business need and requirements.

The boundaries of the role are typically defined by the SZC Digital & IT’s governance structure including policies and procedures related to data management, technology procurement, and project management. The Assistant Project Manager must operate within these boundaries to ensure that their function aligns with regulatory requirements and industry standards.

• Contribute to the definition, planning, execution, and lead documentation of IS projects to baselined time, cost and quality expectations, according to agreed delivery methods and standards.
• Develop the Project Initiation Document for Sponsor sign off that ensures effective estimation of cost, timescales, and resource requirements, including a detailed Quality Plan to create a ‘contract’ of expectations with the Project Sponsor.
• Collaborate with delivery Partners to ensure that they submit robust and realistic detailed project plans to the Project Manager and support the review to enable critical path analysis, ensuring action is taken where these deviate from agreed tolerances, that resources are assigned to tasks for an optimum project delivery model, and that dependencies on other projects or external milestones are actively managed.
• Support with the assurance and oversight of the effective management for project work streams to agreed quality criteria throughout the project lifecycle including detailed design, build, test, technical cutover, training, communications, business readiness, deployment, post go-live support and project closure.
• Support the management of project progress, scope, budget, risks, issues, resources, dependencies, stakeholders, vendors, and requirements throughout the project lifecycle, escalating to the Project Manager or Project Sponsor, as appropriate.
• Support with the assurance of delivery Partners complying with agreed standards, procedures and delivery methods and ensuring commitments are identified, agreed, and delivered without impacting the project quality criteria.
• Support with the assurance of the provision of accurate and timely reporting to the Project Board, PMO and SZC senior management as required.
• Support with the assurance of the development and execution of a stakeholder engagement plan to manage relationships, ensuring buy-in, timely involvement and commitment of key…