Commercial Assistant (Sizewell C)

Commercial Assistant

Location: London

Contract: Permanent, full-time.

Closing date: Wednesday 22nd July 2026

Compensation & Benefits

• Salary: £30,127-38,000 depending on experience
• Bonus: 5% annual incentive
• Pension: Up to 7.5% employee / 15% employer contribution
• Leave: 28 days holiday plus bank holidays

Key Responsibilities

• Divisional / Departmental support.
• Provide high level administrative support to the head of commercial.
• Manage complex diary and email, prepare briefs and presentations, coordinate cross‑departmental communications and ensure smooth daily operations of the divisional office.
• Assist the secretariat for monthly Commercial Approval.
• Assist the secretariat for the bimonthly Commercial Approval Committee (CODEM) – collate and distribute papers, ensure correct authorisations, record minutes and actions, and follow up on decisions; act as deputy secretariat for CODEM.
• Provide support to assurance, audit, and regulatory compliance activities – prepare documentation for audits, maintain registers for risk, actions, deadlines, and compile evidence for internal/external reviews.
• Maintain and build relationships with key contacts and stakeholders, and keep confidentiality of all commercial and personal information.
• Maintain data/records for easy access; arrange meetings, booking of rooms, travel, accommodation, pool/hire vehicles and hospitality as needed.
• Create presentations and reports for the wider team; support document management lead for transfer of information.
• Interface with other teams across the SZC Project, such as Finance, Supply Chain and Site delivery.

Skills & Attributes

• Excellent communication skills and attention to detail.
• Ability to build positive relationships with stakeholders at all levels.
• Proactive approach and willingness to learn.
• Strong organisational skills and manage competing priorities.
• Proficiency in Microsoft Office (Excel, Word, PowerPoint).
• Good understanding of Power BI and other reporting tools.
• Can organise own time and others’ in a dynamic environment.
• Comfortable talking to a wide range of people at many levels in a large organisation.

Other Details

• Location can be based in London or hybrid with routine trips to London and occasional visits to Site.
• Full‑time 37 hours per week.
• Laptop will be provided.
• Requires BPSS security vetting.

Behavioural Competences

• Humility: Recognise the value brought from different cultures and experiences; be open to others’ points of view and ideas; be willing to debate and compromise.
• Positivity: Positively challenge poor quality and performance, identify solutions at the lowest possible level, encourage tier 1s and others to bring new ideas forward.
• Respect: Value the rules and environment in which we operate; give and receive feedback with respect; embrace and engage with new people and ideas; one team, working closely together and helping each other; empowered teams always looking forward; shared responsibility for delivery of the project outcomes.
• Clarity: Communicate clearly and consistently; promote collaboration and team alignment; articulate clear and faster decision making; drive simplification at all levels.

EEO Statement: 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.

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