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 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.

Environmental Sustainability Manager

Location: Suffolk, London, Bristol or Manchester (3 days a week minimum in the office)

Contract Type: Permanent, Full Time

Travel: Regular travel to Sizewell C offices including Suffolk and London (typically monthly), plus occasional travel between Bristol and Manchester offices

Salary: From £85,000 + Bonus + Benefits including;

Bonus up to 10%

28 days annual leave, plus bank holidays

Opportunity to purchase extra holiday

Contributory pension scheme (up to 7.5% employee / up to 15% Sizewell C)

Private medical insurance

Life assurance

Employee assistance programme

Flexible benefits package, opportunity to purchase extra benefits including discounted gym memberships, electric car schemes, etc

Closing Date: Monday the 12th of October 2026

The Opportunity

Reporting to the Sustainability Director, the Environmental Sustainability Manager, will be a key member of the Sustainability Leadership Team, leading the development and delivery of Sizewell C's Environmental Sustainability strategy and driving sustainability performance across the project.

We're looking for a proven sustainability leader who can bring people together, influence at all levels of the business, and translate ambitious sustainability goals into practical, measurable results.

You'll provide strategic leadership and deep technical expertise across multiple sustainability disciplines including carbon, circular economy, water, responsible sourcing, and BREEAM Infrastructure certification. You'll also play a critical role in shaping business decisions, influencing senior stakeholders and Board-level leaders, and ensuring sustainability remains embedded across every aspect of the project.

Why Join as an Environmental Sustainability Manager?

This role offers the opportunity to:

Lead and develop a growing team of environmental sustainability professionals

Shape the sustainability strategy of one of the UK's most significant infrastructure projects

Influence senior leaders, executive stakeholders and external regulators

Drive real-world sustainability outcomes at a nationally important scale

Own and lead key sustainability programmes from concept through to delivery

Help deliver industry-leading performance across carbon, circular economy, water, responsible sourcing, and BREEAM Infrastructure certification

Play a visible leadership role within a highly collaborative and values-driven sustainability function

If you're looking for a position where you can combine strategic leadership, technical excellence and meaningful impact, this is an exceptional opportunity.

What You'll Be Doing

Leading the further development and implementation of the Sizewell C Environmental Sustainability agenda

Contributing to the strategic direction, culture and performance of sustainability across the business

Providing technical leadership across carbon, circular economy, water, responsible sourcing, and BREEAM Infrastructure certification

Managing sustainability programmes from inception through to successful delivery

Influencing and engaging senior leaders, regulators, suppliers and key project stakeholders

Leading a high-performing team

What We're Looking For

We are particularly interested in candidates who demonstrate strong leadership, excel at building collaborative relationships across organisations, and bring substantial technical expertise and credibility.

You'll likely have:

Essential

Demonstrable leadership experience, including leading high-performing teams and developing people

Significant experience within major infrastructure, construction, or other complex capital projects

Significant proven experience in environmental sustainability

Deep technical expertise across environmental sustainability disciplines, including carbon management and PAS2080, water, circular economy, sustainable procurement, and BREEAM Infrastructure

Proven experience developing and implementing sustainability strategies and translating them into measurable outcomes.

Experience influencing senior executives, regulators, clients, and external stakeholders

Excellent relationship-building and stakeholder management skills

A collaborative and engaging leadership style, with the ability to bring teams together and drive delivery

Degree qualification in Environmental Science or a related discipline

Membership of professional organisation such as ISEP, ICE, CIWEM or an equivalent professional body

Desirable

Experience managing regulatory, investor or sustainability commitments

Experience working in highly regulated environments, such as nuclear, energy, utilities, transport, water or other nationally significant infrastructure sectors.

Apply Now

If you're an experienced sustainability leader who can combine strategic thinking with practical delivery, and you're excited by the opportunity to shape sustainability performance on one of the UK's most significant infrastructure projects, we'd love to hear from you.

Join us and help build a cleaner, greener future for Britain.

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.

Sizewell C

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Environmental Sustainability Manager