Location: London based - 3 days per week required in office
Contract Type: Full time/Permanent
Salary - circa £75,000 per annum, dependent on experience
Bonus - 5%
Contributory pension - up to 7.5% (employee) 15% (employer)
28 days holiday + bank holidays, rising to 30 days after 5 years continuous service
Advert closing date: Monday 6th April 2026
About Us
Sizewell C is one of the UK's largest and most significant infrastructure projects. Backed by a consortium of government, energy and institutional investors, we are progressing through the development phase as we prepare to build, commission, operate and ultimately decommission a new nuclear power station on the Suffolk coast.
The Opportunity
We're looking for a Senior Internal Auditor to help deliver high-quality, independent assurance across financial, operational, compliance and project-related activities. Reporting to the Internal Audit Manager / Head of Internal Audit, you will deliver audit engagements in line with the IIA's Global Standards and support the ongoing development of our audit approach as the project evolves.
What You'll Be Doing
- Planning, delivering and reporting on internal audit engagements.
- Leading and overseeing outsourced audit teams through all stages of the engagement.
- Testing and documenting controls, processes and governance arrangements.
- Carrying out interviews with stakeholders to understand and assess business activities.
- Producing clear working papers that support audit findings and recommendations.
- Proposing practical improvements that strengthen risk management and internal control.
- Drafting concise audit reports and presenting these to process owners.
- Following up on agreed actions and monitoring progress.
- Building strong working relationships with stakeholders across the project.
- Supporting risk assessments and contributing to the design of audit methodology.
- Working closely with other assurance functions to align activity and avoid duplication.
- Ensuring compliance with audit standards and contributing to continuous improvement.
- Acting as a point of guidance for junior members of the team (either inhouse or co-sourced audit team).
About You
You’ll bring significant experience in internal or external audit, ideally gained in a large, complex or regulated environment or Internal Control advisory team from well‑known accounting firm. You'll be confident working to professional internal audit standards and able to operate independently while building strong, constructive relationships.
You’ll also have:
- Strong working knowledge of corporate governance, risk and internal controls.
- Experience leading audit or advisory engagements.
- Clear analytical, problem‑solving and report‑writing skills.
- Strong communication skills and confidence influencing at different levels.
- Experience of working with the Three Lines of Defence model.
- Good IT capability, including MS Office; exposure to audit software is an advantage.
- The ability to balance multiple priorities in a fast‑moving environment.
- Flexibility to travel if required.
Qualifications:
- Degree in Finance, Business, Economics or a related discipline.
- Professional audit or accounting qualification preferred (CIA, CA, CPA, ACCA, ACA or equivalent).
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