Site Operations Infrastructure - Assistant Project Manager Sizewell C

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Site Operations Infrastructure - Assistant Project Manager Sizewell C

Location: Sizewell C, Leiston, Suffolk (5 days a week on-site) Contract: Permanent, full - time. Salary: £55,000 - £65,000 dependent on experience. Benefits:

• 5% CIP bonus
• 28 days holiday, plus bank holidays
• Contributory pension of up to 7.5% employee/15% employer
• Ongoing professional development
• Other lifestyle benefits

Closing day: Monday 21st September 2026

Help Deliver One of the UK's Largest Infrastructure Projects

Sizewell C is at the heart of the UK's clean energy future. We're looking for an ambitious and proactive Assistant Project Manager to join our Site Operations Infrastructure team and play a key role in supporting the delivery and maintenance of critical infrastructure across the Sizewell C project.

This is an exciting opportunity for someone with experience in highways, infrastructure maintenance, construction operations, or major project delivery environments who thrives in a fast-paced and highly regulated setting.

The Opportunity

Reporting to the Site Operations Service Delivery Manager, you will support the day-to-day coordination and management of infrastructure operations and maintenance contracts that enable the safe and efficient running of the Sizewell C project.

You will work closely with contractors and stakeholders across a diverse range of activities, including:

• Highway maintenance and minor civils works
• Temporary and permanent infrastructure assets
• Site access roads and pedestrian routes
• Security access plazas
• Temporary buildings and facilities
• Utilities and support infrastructure
• Off-site property maintenance activities

As part of the Site Operations team, you'll help ensure services are delivered safely, efficiently, on time and within budget while supporting a peak construction workforce of approximately 8,000 people.

Key Responsibilities

• Support the management of infrastructure operation and maintenance contracts with values of up to £10m annually.
• Coordinate contractors delivering construction, maintenance and operational activities across site.
• Ensure compliance with all statutory, regulatory and site-specific requirements.
• Monitor contractor performance against KPIs, SLAs, safety standards and project objectives.
• Support budget management, forecasting and financial reporting activities.
• Manage stakeholder relationships across multiple functions and disciplines.
• Assist with temporary works design coordination and design change management.
• Ensure construction and maintenance activities are effectively integrated with surrounding contractors and project teams.
• Contribute to weekly progress reviews and recovery planning where necessary.
• Support monthly reporting on safety, performance, financials and future planning.
• Champion a collaborative "one team" approach across contractors and project stakeholders.
• Promote and maintain the highest standards of health, safety and environmental performance.

About You

We're looking for a motivated individual who enjoys solving problems, managing competing priorities and working collaboratively across large-scale projects.

Essential Experience & Skills

• Experience working within a highways, infrastructure, construction or service-led operational environment.
• Proven experience delivering work safely in a highly regulated setting.
• Experience managing contractors, teams or service providers.
• Strong IT, communication and stakeholder management skills.
• Experience within large, complex projects.
• Ability to work effectively in a dynamic and fast-paced environment.
• Strong organisational and problem-solving skills.
• Confidence to make decisions and manage changing priorities.
• Collaborative approach with a commitment to building positive working relationships.

Desirable Qualifications & Experience

• HND, HNC or equivalent qualification in a related discipline.
• Experience with road and network construction projects.
• Experience delivering modular building projects.
• Experience managing vehicle and pedestrian access infrastructure.
• Knowledge of construction quality assurance and quality control processes.
• Experience using Microsoft Project and Microsoft Office applications.
• AutoCAD experience.
• Experience developing and managing project budgets.

Apply Now!

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.