Project Manager​/NECSupervisor

Overview

The UK’s nuclear sector has entered a renaissance, with Nuclear Energy now a vital component as the country moves towards a target of Net Zero. Assystem provides critical support to this mission, accelerating the decommissioning and remediation of our legacy assets with a view to enabling a swifter energy transition. As a global top‑three independent nuclear engineering organisation, we are active across the full decommissioning lifecycle and bring an established pedigree for delivery engineering excellence.

The Project Manager / NEC3 Supervisor reports to the Senior Project Manager and plays a key role in supporting the overall management and coordination of this capital infrastructure project. The Project Manager element focuses on strategic planning, risk management, and quality control throughout the project lifecycle. The NEC3 Supervisor element works within a nuclear safeguarding setting to ensure construction activities are delivered to the highest quality and safety standards.

The role demands strong project management principles, proactive problem‑solving, and effective communication with stakeholders, contractors, and team members.

• Support the PM in the administration and management of NEC contracts (ECI, ECC & Short Form).
• Assist in managing project financial performance, controlling expenditure against approved budgets and updating forecasts.
• Contribute to project assurance and gateway reviews, providing confidence to senior leadership and stakeholders.
• Monitor contractor, technical support provider, and supply chain performance against contractual obligations.
• Maintain productive working relationships with the supply chain throughout delivery.

• Review and challenge duration and cost estimates, identifying critical dates and risks.
• Apply financial metrics to track cost trends and forecast final costs.
• Review and assess proposed changes, determining high‑level impacts and advising on options.
• Maintain accurate site records to support commercial processes (e.g., daily diaries).
• Manage site‑based records and document control.

• Act in accordance with NEC3 ECC principles, promoting mutual trust and respect.
• Conduct inspections and tests to ensure compliance with the scope.
• Attend Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT).
• Notify and manage defects through to completion and defects date.
• Mark equipment, plant and materials for payment purposes where applicable.
• Advise the PM of any contractor performance concerns.

• Monitor contractor health & safety performance on site and attend safety meetings.
• Review Test & Commissioning documentation and manage commissioning team outputs.
• Prepare quality performance reports and track quality KPIs.
• Support lessons learned capture and tracking throughout the project lifecycle.

• Liaise with base personnel and stakeholders to ensure efficient project delivery.
• Support project optioneering and problem‑solving activities.
• Assist contractors in navigating base permit systems and training certification requirements.

• Minimum 5 years post‑graduate experience in engineering or project delivery roles.
• Strong technical background with engineering or project management qualifications (ONC/OND or equivalent in Civil Engineering or related discipline).
• Excellent working knowledge of NEC3/NEC4 contracts and understanding of CDM and health & safety regulations.
• SMSTS and CITB CSCS certified.
• High attention to detail and a collaborative, solution‑focused approach.

• Experience working on ONR/DNR regulated sites.
• HNC/HND (or higher) in Civil Engineering or related discipline.
• NEC4 Supervisor accreditation and/or NEC PM accreditation.
• IOSH Managing Safely and First Aid certification.
• Membership of a relevant professional body.
• APM PMQ (or higher).

Why join the community of Switchers?

• The group is currently ranked third in the world for nuclear engineering.
• A dynamic career management policy to enable employees to progress through five business lines.
• Opportuni…