Internal Audit Manager

Location: London - minimum 2 days a week in the office (with occasional visits to site, Suffolk)

Salary: Competitive, depending on experience, plus up to 10% bonus, plus extensive benefits including:

• Generous contributary pension scheme up 7.5% employee / up to 15% Sizewell C
• Private healthcare
• Annual bonus opportunities
• 28 days’ holiday plus bank holidays
• Opportunity to buy additional holiday
• A monthly flexible benefits allowance to spend on a variety of benefits
• A wide range of professional development and wellbeing support

Contract Type:  Permanent, full time

Closing Date: Tuesday 17th of February 2026

About the Role

As Internal Audit Manager, you will lead the end to end delivery of high quality assurance and advisory engagements across one of the UK’s most complex and high profile infrastructure programmes. Reporting directly to the Head of Internal Audit, you will take full ownership of planning, execution and reporting, delivering clear, evidence based insights to SZC’s Executive Team and Audit & Risk Committee.

This is a hands‑on delivery role for an experienced internal auditor who combines strong professional judgement with the confidence to challenge, influence and add real value in a fast‑moving, highly regulated environment. You may also have line management responsibility for up to two Internal Auditors and play a key role in developing the wider team.

Why This Role Is Exciting

You will be part of a nationally significant project that is reshaping the UK’s energy infrastructure and long‑term energy security.

SZC operates at the intersection of government, regulators, investors and delivery partners, exposing you to complex risks, novel issues and genuinely consequential decisions.

Your work will directly protect value, safety and programme outcomes across the full project lifecycle.

The internal audit function is evolving, giving you the opportunity to help shape a modern, insight‑led approach to assurance, including integrated assurance and advanced audit techniques.

This is a role with real influence, where the quality of your work informs senior and executive decision‑making.

What You’ll Be Doing

• Planning, delivering and reporting internal audit engagements across financial, operational, compliance and IT‑related risk areas.
• Providing independent assurance, advice, insight and foresight to strengthen governance, risk management and internal control.
• Preparing and presenting audit findings to senior stakeholders, including the Executive Team and Audit & Risk Committee.
• Developing corrective action plans with management and tracking progress.
• Contributing to the development of the annual internal audit plan.
• Supporting SZC’s integrated assurance framework across the three lines of defence.
• Coaching and developing junior auditors and supporting co‑source partners where required.
• Keeping abreast of latest developments in risk, assurance, methodology and audit technologies.

What We’re Looking For

• Minimum of seven years’ relevant audit, risk or assurance experience.
• Significant experience delivering internal audit engagements in large, complex organisations or within a leading professional services firm (Big 4 ideal, but not essential).
• Strong experience independently delivering high quality internal audit work in fast moving, complex environments.
• Excellent written and verbal communication skills, including presenting to senior management and committees.
• Comfortable challenging constructively and handling difficult stakeholder conversations.
• Experience coaching or managing small teams is essential.
• Strong understanding of global internal audit standards and leading practices.
• Professional qualification such as CIA / CISA (highly advantageous, but not essential).
• Experience in IT enabled audits is a plus but not essential for candidates with exceptional core audit capabilities.
• Experience in major projects, civils or government funded environments is beneficial but not required.

Ready to play a key role in shaping modern, impactful assurance at the heart of a nationally significant project? Apply today.

Join the team at Sizewell C. Our vision is to Lead The Way On Nuclear.

The Sizewell C team is one of the most exciting and largest new megaprojects in the UK, whilst being at the forefront of the UK’s climate change agenda and energy policy.  We have begun constructing a 3.2-gigawatt nuclear power station on the Suffolk coast in the East of England replicating, wherever possible, the design used for Hinkley Point C, another nuclear power station being built in Somerset.

When built, Sizewell C will be one of the largest power stations to operate in the UK. The power station will generate low carbon electricity for at least 60 years, supplying over 6 million homes and supporting around 7% of the UK’s current electricity needs.

Our vision is to Lead The Way On Nuclear. We want Sizewell C to define what good leadership for the nuclear industry and British infrastructure looks like and deliver on it.  We understand the feats of organisation, logistics, collaboration and imagination that building nuclear requires. We are building for the next generation for their home-grown energy, energy price stability and ultra-low carbon power in abundance. We also want to set the benchmark for maximising long-lasting social value as we build and demonstrate how smart collaboration can work for the benefit of communities – locally, regionally and nationally.

We are the first nuclear power station in the UK to be funded under the Regulated Asset Base funding model (RAB). Our largest shareholder is the UK Government, alongside equity partners La Caisse, Centrica, EDF and Amber Infrastructure.     

Sizewell C operates within a complex and fast-moving stakeholder environment, engaging with a wide range of partners including government bodies, regulators, local communities, supply chain partners, and international collaborators. This makes Sizewell C a uniquely stimulating place to work — where navigating evolving priorities, balancing interests, and building trusted relationships is just as critical as technical excellence. For those who thrive in dynamic, multi-dimensional settings, it offers unmatched professional challenge and growth.

When joining Sizewell C, you may wonder why you are contacted by colleagues with an EDF email or see the EDF logo on portals that you access and/or documentation you receive; this is because we have partnered with EDF for the provision of a number of support services whilst we complete a successful transition out of the EDF group.

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. Whilst sponsorship may be a possibility that we can explore, we are fully committed to local recruitment where possible, and those already holding 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.

By submitting an application to this role, you acknowledge that you have read and understood Sizewell C’s employee privacy policy and EDF's employee privacy policy. Just to let you know, EDF will be processing and sharing information about your application on behalf of Sizewell C.