Assistant Commerical Manager (Sizewell C)

Sizewell C Limited; Greater London; Hybrid; GBP 42,000 - 47,000; Full time

Benefits offered by this job

Bonus: 5% annual incentive

Pension: Up to 7.5% employee + 15%

Holidays: 28 days + BH

Ongoing professional development

Cycle-to-work scheme

Employee discounts

Job summary

Sizewell C in London is seeking an Assistant Commercial Manager to support end-to-end procurement across Corporate Functions, with hybrid working flexibility and travel to the London office 2–3 days per week, as required.

You will help develop procurement strategies, manage contracts and supplier engagement, and build relationships with stakeholders while ensuring governance and compliance across the project. This role offers growth within a high-impact energy initiative.

Qualifications

• Experience in procurement in Professional Services, Legal, Insurance, Business Intelligence categories would be preferential.
• Strong stakeholder management and communication skills.
• Experience in corporate functions procurement and contract negotiation.
• Solid understanding of commercial law and contractual terms.
• Proven ability to manage high-value, multi-disciplinary contracts.
• Member or student member of CIPS (preferred).
• Experience working in cross-functional teams and advising senior management.

Responsibilities

• Lead and support procurement processes from strategy to contract award.
• Manage commercial aspects of contracts during execution.
• Build trusted relationships with internal stakeholders to support pipeline development.
• Ensure compliance with SZC’s procurement policies and governance.
• Collaborate with legal teams on contract terms and NDAs.
• Develop RFP/RFQ packages and manage supplier engagement.
• Maintain accurate procurement records and reporting dashboards.
• Drive lessons learned and continuous improvement across procurement activities.

Skills

Stakeholder management

Communication

Cross-functional teams

Contract negotiation

Commercial law

CIPS (preferred)

Job description

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Assistant Commerical Manager (Sizewell C)

Job Category: Finance

Contract Partner Company: Jobs Service

Employing Company: Sizewell C

The Sizewell C Jobs Service supports local people into exciting, long-term careers across our Project.#SZCJobs

Assistant Commercial Manager
Sizewell C

Location: Preferably London, with occasional travel to Ipswich. Successful candidate must be prepared to travel to the London office 2-3 days per week, if required, and on occasion to Suffolk and Bristol.
Contract Type: Office-based, with hybrid working flexibility
Working Pattern: Full time

Salary & Benefits

• Salary: £42,000-£47,000 (depending on experience)
• Bonus: 5% annual incentive
• Pension: Up to 7.5% employee contribution, 15% employer contribution
• Holidays: 28 days annual leave plus Bank holidays
• Ongoing professional development
• Cycle-to-work scheme
• Employee discounts and pricing

We operate on an office-based contract model, but support hybrid working where possible. This means you’ll need to be based within reasonable travel distance of the office and able to attend in person when business needs require—typically 2–3 days per week, though this may vary by team or project. Flexibility to be on site when needed is essential.

Join Us at a Pivotal Moment in UK Energy History

Sizewell C (SZC) has recently secured Final Investment Decision (FID) approval, marking a major milestone in the UK’s energy future. As we transition into a standalone organisation, we’re laying the foundations for long-term success—and we’re looking for a Assistant Category Manager – Professional Services to support the Category Manager and help shape that journey.

About the Role

You’ll play a key role in delivering end-to-end procurement activities (source to contract) across SZC’s Corporate Functions by supporting the Category Manager in meeting the category’s objectives. You’ll support the development and execution of procurement strategies, manage stakeholder relationships, and ensure compliance with governance frameworks—all while driving continuous improvement and best practice.

This is a unique opportunity to be part of a high-impact project from the ground up, helping to build a fair, transparent, and commercially robust procurement environment, whilst continuing your growth within Procurement.

Key Responsibilities

Support the Category Manager with the following:

• Lead and support procurement processes from strategy to contract award.
• Manage commercial aspects of contracts during execution.
• Build trusted relationships with internal stakeholders to support pipeline development.
• Ensure compliance with SZC’s procurement policies and governance.
• Collaborate with legal teams on contract terms and NDAs.
• Develop RFP/RFQ packages and manage supplier engagement.
• Maintain accurate procurement records and reporting dashboards.
• Drive lessons learned and continuous improvement across procurement activities.

What We’re Looking For

Experienced in procurement in the Professional Services, Legal, Insurance, Business Intelligence categories would be preferential.

• Strong stakeholder management and communication skills.
• Experience in corporate functions procurement and contract negotiation.
• Solid understanding of commercial law and contractual terms.
• Proven ability to manage high-value, multi-disciplinary contracts.
• Member or student member of CIPS (preferred).
• Experience working in cross-functional teams and advising senior management.

Why Join SZC?

This is more than just a job—it’s a chance to be part of a nationally significant infrastructure project that will power millions of homes and help the UK meet its net-zero targets. You’ll be joining a passionate, collaborative team at a time of exciting growth and transformation.

For this role you must have evidence of right to work in the UK. As a project, we do not discriminate on the grounds of age, gender, race, colour, religion, disability or sexual orientation, and we welcome applications from all sections of the community.

Why Join Us?

For more than 60 years, nuclear power stations in the UK have been quietly keeping Britain fuelled with massive amounts of home-grown energy.

Our teams up and down the country are proudly continuing to serve the nation – but they also have an eye on the future.

EDF is leading the UK's nuclear renaissance with the construction of a new nuclear power station at Hinkley Point C and plans for a new power station at Sizewell C in Suffolk.

Nuclear power is the most reliable, low-carbon energy source currently available to the UK. EDF is playing a key role in the development of nuclear sites, while Hinkley Point C will provide low-carbon electricity to meet 7% of the UK demand. The project is already making a positive impact on the local and national economy as well as boosting skills and education.

We’re not just building new nuclear power stations. We’re developing careers, upskilling generations and creating thousands of employment and apprenticeship opportunities across a variety of skills areas.

It takes a special kind of person to work in the nuclear energy industry and although we have thousands of them there’s always a need for more.

Our industry has a mind-boggling range of opportunities and more jobs, and in more places, than you might think. But it’s also an industry which is changing.

We’re a responsible business and proud to be Britain’s biggest generator of zero carbon electricity. With size, age and experience, we believe we can do even more.