Assistant Digital Portfolio Accountant in London

Sizewell C’s business is to design, finance, construct, commission, operate, maintain, and eventually decommission the nuclear power plant and related infrastructure at Sizewell C in Suffolk. Overall, whilst the Company is in the construction phase, the Boards’ principal focus is on the development and construction of Sizewell C on time, on budget and to the highest quality and safety standards. The Company is maturing to meet all these requirements.

Sizewell C is economically regulated by OFGEM under the Regulated Asset Base (RAB) model similar to other UK electricity distribution networks and Thames Tideway. Sizewell C construction strategy is to replicate the design of Hinkley Point C, using the majority of the same supply chain, but innovating in the way it is delivered to achieve savings in time and cost of around 20%. The CCO will need to be guided by and incorporate lessons learned from the Hinkley Point C commercial delivery to achieve Sizewell C’s ambition.

Following Financial Completion and Revenue Commencement, Sizewell C is fully funded and is owned by; The Secretary of State for Energy Security and Net Zero representing HM Government, La Caisse, Centrica, EDF and Amber Infrastructure. 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.

Your role as Assistant Portfolio Accountant will be to support the Portfolio Accountant in the day-to-day financial management of the Sizewell C Digital & IT Portfolio. You’ll help maintain accurate financial records, support budgeting and forecasting activity, track project costs, and provide clear information to project teams and finance stakeholders. This is a great opportunity for someone developing their finance career who enjoys working with data, solving problems, and helping teams make well-informed financial decisions.

Principal Accountabilities

• Support budgeting and forecasting processes for the Sizewell C Digital & IT Portfolio, including annual forecast submissions and in-year updates.
• Help maintain portfolio financial trackers, ensuring project costs, forecasts, commitments and movements are recorded accurately and consistently.
• Support monthly cost reviews with Project Managers, Business Analysts and other stakeholders, helping to explain variances between actuals, forecasts and approved budgets.
• Assist with the preparation of reporting packs and financial summaries for portfolio governance forums and senior stakeholder reviews.
• Support month-end activities, including accruals, recharges, purchase order reviews and cost substantiation.
• Work with project teams to improve the quality of forecast information, challenge assumptions where appropriate, and highlight risks or issues early.
• Help reconcile portfolio reporting outputs to SAP and other finance systems, supporting a single, reliable view of financial performance.
• Contribute to investment case reviews, cost analysis and project deep dives under the guidance of the Portfolio Accountant.
• Identify opportunities to improve reporting processes, templates and financial controls across the portfolio.
• Carry out ad hoc analysis and support wider finance activities as required.

Knowledge, Skills, Qualifications & Experience

• Part-qualified accountant, studying towards CIMA, ACCA or ACA, or qualified by relevant experience.
• Good Excel skills, with the ability to analyse, reconcile and present financial information clearly.
• Experience working with finance systems such as SAP, Anaplan or similar tools would be beneficial.
• Strong attention to detail and a commitment to producing accurate, reliable work.
• Clear communication skills, with the confidence to work with finance and non-finance colleagues.
• Ability to organise workload, manage competing priorities and deliver to deadlines.
• A proactive approach, with curiosity to understand project performance and improve ways of working.
• Interest in working on a major infrastructure programme within a regulated environment.
• Experience in project finance, management accounting, project controls, PMO or cost reporting.
• Experience supporting budgeting, forecasting, accruals, purchase orders or financial reporting processes.
• Previous experience in infrastructure, energy, digital, construction, regulated or safety-critical environments.

Why Join Us

• A major infrastructure project with national impact.
• Hybrid working with flexibility built in.
• Competitive salary, bonus and benefits.
• Clear progression and development opportunities.
• Supportive, collaborative team environment.

At Sizewell C we encourage and embrace diversity and how it can improve our experience and performance at work. It is a requirement that those who join us have the right to work in the UK. To be appointed to this role, you will need to meet the criteria for Security Vetting, which will, ordinarily, require you to have been a resident of the UK for at least three of the past five years.