Snr Commercial Manager

Sizewell C; Greater London; Hybrid; GBP 74,000 - 90,000; Full time

Benefits offered by this job

5% annual incentive

Pension up to 7.5% employee / 15%0rmer

Holiday: 28 days + bank holidays

Flexible benefits

Job summary

Sizewell C is seeking a Senior Commercial Manager for the Civil Works Programme to drive commercial governance across the Programme Alliance Agreement, and to support directions across design, cost, schedule and risk management.

You will act as SME on the PAA, identify gaps, deliver training, and promote efficient contract administration using the Unifier platform, while coordinating with legal, land, environment and safety teams.

Qualifications

• Senior-level experience in commercial or supply chain on major infrastructure or energy projects.
• Strong procurement and post-contract management experience.
• Good understanding of dispute avoidance and issue resolution.
• Knowledge of Alliance, NEC and/or FIDIC contracts.
• Experience with alliance or target cost contracts (advantageous).
• Excellent stakeholder management and communication.
• Ability to translate complex contracts into practical guidance.

Responsibilities

• Act as SME on the PAA and identify gaps.
• Provide practical commercial advice to contractor teams.
• Support contract administration and governance.
• Promote dispute avoidance through proactive issue resolution.
• Develop training materials and templates for PAA.
• Deliver training and coaching to commercial teams.
• Embed consistent contract management standards.
• Support Unifier platform development and process improvements.
• Drive supplier performance and commercial governance.
• Mitigate risks and resolve commercial issues.
• Provide strategic oversight across the portfolio.

Skills

Senior commercial experience

Supply chain experience

Stakeholder management

Negotiation skills

Communication skills

Contract management

Dispute avoidance

Education

Bachelor's degree in quantity surveying, civil engineering, law, construction or project management

MCIPS/MRICS/MCIArb/MAPM/MCIOB or equivalent

Tools

Unifier

Job description

Sizewell C is entering an exciting phase of growth as we mature into an independent organisation and continue building one of the UK's largest and most important energy projects. We are now recruiting for the below position.

Senior Commercial Manager - Civil Works Programme

Contract Type: Permanent -Office-based with hybridflexibility(typically 3 days p/w in the office)

Working Pattern: Full time

Closing Date: Friday 4th September 2026

Location: London

Salary: Circa £82,000 depending on experience

Bonus: 5% annual incentive
Pension: Up to 7.5% employee contribution / 15% employer contribution
Holiday: 28 days plus bank holidays

Benefits: Flexible benefits

About the Role

Reporting To: Commercial Lead - Civil Works, As Senior Commercial Manager you will support the effective implementation of the Programme Alliance Agreement (PAA) - a multi billion pound, multi party alliancing contract - across Sizewell C (SZC) processes, systems and teams.

The role will focus on assisting in the identification and resolution of interface gaps between PAA contractual requirements and SZC functional processes, providing expert advice to Commercial teams and functions, developing contract management guidance, and training, and supporting the use and development of the Unifier contract administration tool.

This role suits a big picture thinker-someone who can evaluate options, risks and consequences to shape effective solutions. Working proactively with functions such as design, project controls (cost, programme, risk), delivery, legal, land, consents, environment and sustainability, site operations, health and safety, quality and document control, the Senior Commercial Manager brings clarity, alignment and confident decision making to high pressure, fast moving environments. The role ensures robust governance, identifies gaps in contracts, policies and procedures, and strengthens commercial controls across the programme.

Key Responsibilities

PAA Contract Management:

• Acting as a subject matter expert on the PAA.
• Identifying and resolving gaps between contractual requirements and SZC processes.
• Providing practical commercial advice to contractor teams and functions.
• Supporting consistent contract administration and governance across the programme.
• Promoting dispute avoidance through proactive issue resolution.

Training, Guidance and Capability

• Developing training materials, guidance and templates for the use of the PAA.
• Producing and supporting roll-out of the Contract Management Manual.
• Delivering training and coaching to commercial and functional teams.
• Embedding consistent contract management standards across the SZC Civils programme.

Systems and Process Improvement

• Supporting the development of the Unifier contract administration platform .
• Ensuring commercial processes, controls and workflows are embedded effectively.
• Identifying opportunities to improve efficiency, transparency and data quality.

Post-Award Contract Management

• Driving supplier performance and commercial governance.
• Mitigating risks and resolve commercial issues.
• Supporting proactive dispute avoidance.
• Providing strategic oversight across the relevant portfolio.

What the candidate will bring

• Senior-level experience in commercial or supply chain roles on major infrastructure, energy, nuclear or complex regulated projects.
• Strong procurement and post-contract management experience.
• Good understanding of dispute avoidance and issue resolution.
• Strong knowledge of Alliance, NEC and/or FIDIC contracts.
• Experience with alliance or target cost contracts would be advantageous.
• Excellent stakeholder management, negotiation and communication skills.
• Ability to translate complex contractual requirements into practical guidance and processes.

Education and Professional qualifications:

• Bachelor's degree in quantity surveying, civil engineering, law, construction or project management or equivalent.
• Professional qualifications such as MCIPS, MRICS, MCIArb, MAPM, MCIOB or equivalent are preferred.