Commercial Assistant (Sizewell C)
The SZC Jobs Service supports local people into exciting, long-term careers across our Project. #SZCJobs
Commercial Assistant (Sizewell C)
Location: Suffolk, London or Bristol
Contract Type: Office-based, with hybrid working flexibility
Working Pattern: Full time
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.
At Sizewell C, we’re building a better future — one powered by clean, reliable nuclear energy. Our project will supply electricity to six million homes, cut nine million tonnes of CO₂ annually, create thousands of skilled jobs, and support thriving natural habitats.
We’re looking for Commercial Assistants to help us deliver one of the UK’s most ambitious infrastructure projects. If you’re ready to make a meaningful impact, this is your opportunity.
The Opportunity
As a Commercial Assistant, you’ll provide essential support to the Supply Chain Management Team. You’ll work closely with colleagues across Nuclear Development to ensure contracts are delivered effectively and contribute to the success of the Sizewell C project.
Key Responsibilities:
Contractor Applications: Process payment certificates in line with contractual terms.
Progress Reviews: Attend valuation and progress meetings to monitor delivery.
Reporting: Prepare commercial cost reports, progress metrics, and supplier performance reviews.
Process Management: Manage the Early Warning process and maintain commercial tools such as CEMAR and SAP.
What You’ll Bring
Experience in a commercial or procurement environment.
Familiarity with industry-standard procurement practices.
Understanding of contract performance, risk, and change management.
Knowledge of estimating, valuations, cost reporting, and financial modelling.
Salary & Benefits
Salary: £31,000 – £36,000 (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
Additional Benefits:
Ongoing professional development
Cycle-to-work scheme
Employee discounts and pricing
Why Join Us?
At Sizewell C, you’ll be part of a team tackling one of the world’s biggest challenges — climate change. We’re committed to doing the right thing by our people, offering a supportive, inclusive environment where your voice is heard and your growth is supported.
Ready to power up your career?
#DestinationNuclear
#SZCjobs
Power in Diversity
Sizewell C is a great place to work, where everyone is welcome.
To fulfil our commitment of doing the power of good for Britain, our ambition is to have a workforce which reflects and benefits the society we are part of and serve. Every worker on SZC, wherever they are, should help to create and experience the right environment where everyone on the team understands, respects and embraces diversity with a culture where everyone is treated with equal respect and are all given equal access to opportunities. By valuing the different points of view and experiences that having a diverse team brings, and by fostering an inclusive climate, we will create a great place to work and a more successful project.
We create the right environment where people feel able to bring their whole selves to work. Whilst working together there is mutual trust and appreciation created through the building of meaningful relationships with one another, aligned with our key values:
Respect: Value the rules and environment in which we operate
Positivity: Positively challenge poor quality and performance
Humility: Be open to other’s points of view and ideas, be willing to debate and to compromise
Solidarity: One team, working closely together and helping each other
Clarity: Communicate clearly and consistently
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.
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.
The SZC Jobs Service supports local people into exciting, long-term careers across our Project. #SZCJobs
Commercial Assistant (Sizewell C)
Location: Suffolk, London or Bristol
Contract Type: Office-based, with hybrid working flexibility
Working Pattern: Full time
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.
At Sizewell C, we’re building a better future — one powered by clean, reliable nuclear energy. Our project will supply electricity to six million homes, cut nine million tonnes of CO₂ annually, create thousands of skilled jobs, and support thriving natural habitats.
We’re looking for Commercial Assistants to help us deliver one of the UK’s most ambitious infrastructure projects. If you’re ready to make a meaningful impact, this is your opportunity.
The Opportunity
As a Commercial Assistant, you’ll provide essential support to the Supply Chain Management Team. You’ll work closely with colleagues across Nuclear Development to ensure contracts are delivered effectively and contribute to the success of the Sizewell C project.
Key Responsibilities:
Contractor Applications: Process payment certificates in line with contractual terms.
Progress Reviews: Attend valuation and progress meetings to monitor delivery.
Reporting: Prepare commercial cost reports, progress metrics, and supplier performance reviews.
Process Management: Manage the Early Warning process and maintain commercial tools such as CEMAR and SAP.
What You’ll Bring
Experience in a commercial or procurement environment.
Familiarity with industry-standard procurement practices.
Understanding of contract performance, risk, and change management.
Knowledge of estimating, valuations, cost reporting, and financial modelling.
Salary & Benefits
Salary: £31,000 – £36,000 (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
Additional Benefits:
Ongoing professional development
Cycle-to-work scheme
Employee discounts and pricing
Why Join Us?
At Sizewell C, you’ll be part of a team tackling one of the world’s biggest challenges — climate change. We’re committed to doing the right thing by our people, offering a supportive, inclusive environment where your voice is heard and your growth is supported.
Ready to power up your career?
#DestinationNuclear
#SZCjobs
Power in Diversity
Sizewell C is a great place to work, where everyone is welcome.
To fulfil our commitment of doing the power of good for Britain, our ambition is to have a workforce which reflects and benefits the society we are part of and serve. Every worker on SZC, wherever they are, should help to create and experience the right environment where everyone on the team understands, respects and embraces diversity with a culture where everyone is treated with equal respect and are all given equal access to opportunities. By valuing the different points of view and experiences that having a diverse team brings, and by fostering an inclusive climate, we will create a great place to work and a more successful project.
We create the right environment where people feel able to bring their whole selves to work. Whilst working together there is mutual trust and appreciation created through the building of meaningful relationships with one another, aligned with our key values:
Respect: Value the rules and environment in which we operate
Positivity: Positively challenge poor quality and performance
Humility: Be open to other’s points of view and ideas, be willing to debate and to compromise
Solidarity: One team, working closely together and helping each other
Clarity: Communicate clearly and consistently
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.
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.