Interim HR Business Partner Manager – Sizewell C | Moorgate, London (Hybrid)

Contract: Fixed Term (12–18 months)
Start Date: End of June / Early July 2025
Closing Date: 21st April 2025

Shape the Future of UK Energy – and Your Career

At Sizewell C, we’re not just building a power station—we’re building a legacy. As one of the UK’s most ambitious infrastructure megaprojects, we are committed to delivering low-carbon energy for generations to come. Now, we’re looking for a dynamic, strategic, and experienced HR professional to join our growing team at a pivotal time in the project.

This is your chance to make a tangible impact—not only on the future of clean energy, but on the people powering it.

The Opportunity

Are you a proven HR leader who thrives in fast-paced, transformational environments? Do you enjoy working across complex projects with a mix of operational and strategic challenges? Then you could be our next Interim HR Business Partner Manager.

In this maternity cover role, you’ll partner closely with our HR leadership and wider Business Partnering teams to deliver high-impact HR projects and provide expert guidance across the Sizewell C business. From optimising TUPE and IR35 processes to supporting business units with people strategy and workforce development—you’ll be at the forefront of enabling a high-performing, future-ready organisation.

Why Sizewell C?

We’re entering a new phase of delivery—moving from planning to construction—and our HR team is right at the heart of it. This is an exciting moment to join a business that’s not only driving the UK’s Net Zero ambitions but also creating lasting social value through thousands of skilled jobs.

You’ll enjoy the rare opportunity to help shape the people strategy of a major project from the ground up, while gaining exposure to transformational change, organisational growth, and strategic HR delivery at scale.

What You’ll Be Doing

• Leading and delivering high-profile HR projects (including TUPE, IR35, and process innovation)
• Partnering with HR Business Partner Managers and their teams to support functional and delivery areas
• Supporting workforce planning, performance, and talent management initiatives
• Driving change, continuous improvement, and best practice in a dynamic and evolving environment
• Acting as a senior point of contact across HR and the wider business, influencing and advising senior stakeholders

What You’ll Bring

• A solid HR generalist background, with a track record of delivering complex people projects
• Expertise in employment law, HR strategy, and partnering in a fast-paced or start-up/subsidiary environment
• Experience with TUPE and IR35 (ideal but not essential)
• Strong stakeholder engagement and influencing skills—you’ll be confident working across senior leadership
• Flexibility, pragmatism, and a proactive, solutions-focused mindset

What We Offer

• Salary from c£75,000, depending on experience
• Annual 10% bonus and flexible benefits package
• Market-leading pension scheme: up to 7.5% employee/15% employer
• Hybrid working (2–3 days a week in the Moorgate office)
• Supportive, inclusive culture with a strong emphasis on collaboration, development, and wellbeing

Power in Diversity

We believe that diversity drives innovation and strengthens our success. At Sizewell C, we’re building a workplace where everyone feels valued, heard, and empowered to thrive. We’re proud of our inclusive culture and we welcome applications from all backgrounds.

We live our values every day:

• Respect | Positivity | Humility | Solidarity | Clarity
• Ready to energise your career?
  Join us and be part of something truly meaningful. Apply now and play your part in powering a greener, more sustainable Britain.
• Apply by 21st April 2025
  Start Date: June/July 2025
  Interested in flexible working? Let us know—we’d love to chat.

Sizewell C Limited (Sizewell C) is nuclear site licensed company whose business is to design, finance, construct, commission, operate, maintain, and eventually decommission the nuclear power plant and related infrastructure at Sizewell C in Suffolk. Sizewell C was formerly under the majority ownership of the EDF Group but is currently majority owned by HM Government and operates as an independent company. EDF remains a key shareholder in Sizewell C and the business therefore maintains close links to EDF as a part of its ‘nuclear family’.

 As a Sizewell C employee, 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.

Join the team at Sizewell C. The power of good for Britain.

It’s not every day you get the opportunity to shape the working culture of what will be one of Europe’s largest construction projects, while also helping Britain to reach its target of Net Zero emissions by 2050. That’s one of the reasons Sizewell C will be unlike anything you’ve ever experienced before, and you’ll need to be an exceptional professional to reach the high standards this critical infrastructure project demands. 

The UK is experiencing a nuclear renaissance and Sizewell C – along with its sister project at Hinkley Point C in Somerset – is powering the change. We’re ramping up at pace as we look ahead to the Financial Investment Decision in early 2025, and the start of construction soon after. With government fully on board and public opinion shifting significantly in favour of nuclear, there’s never been a better time to join our project.

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.