About this role

Company Description

Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements.ย 

Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.

Job Description

Summary of the Role.ย  The Project Manager's role is to ensure the successful delivery of this capital infrastructure project and will ensure that project team members are provided with direction and support to lead, manage and deliver projects, and achieve project outputs. Infrastructure delivery is a challenging environment in which to work, with interdependencies between the required programmes and projects and the need to maintain military outputs. The candidate will be required to deliver at pace and demonstrate effective application of programme and project management skills, tools and techniques.

TASKS

๐Ÿšง Project Management & Delivery

  • ๐Ÿ—๏ธ Lead the preparation, delivery and commissioning of infrastructure projects from inception through to completion.
  • ๐ŸŽฏ Establish and deliver clear project objectives, ensuring successful outcomes aligned to business needs.
  • ๐Ÿ‘ฅ Build and lead high-performing teams, fostering collaboration, accountability and stakeholder engagement.
  • ๐Ÿค Manage contracts, suppliers and industry partners, monitoring quality, cost, schedule and performance against agreed obligations.
  • โš ๏ธ Proactively identify and manage risks, issues and dependencies to prevent delays and cost escalation.
  • ๐Ÿ’ท Manage project budgets, cashflow forecasts and expenditure, providing accurate financial reporting and forecasting.
  • ๐Ÿ“Š Review, challenge and monitor project schedules, milestones and key delivery stages to ensure progress remains on track.
  • โœ… Support and provide evidence for project assurance, gateway reviews and governance activities.
  • ๐Ÿ”„ Oversee change control processes, assessing impacts and making recommendations on proposed project changes.
  • ๐Ÿ“ˆ Maintain project plans, forecasts, estimates and configuration management records to ensure effective project control.
  • ๐Ÿ“‘ Ensure compliance with client processes, operating procedures and infrastructure governance requirements.
  • ๐Ÿ”’ Manage contract close-out activities, ensuring all contractual, commercial and maintenance obligations have been fulfilled.
  • ๐Ÿ›ก๏ธ Apply strong risk management principles, ensuring risks are identified, assessed, monitored and mitigated throughout the project lifecycle.
  • ๐Ÿ“ข Provide clear reporting and communications to senior management, customers and key stakeholders, ensuring confidence in project delivery.

ย 

Qualifications

EXPERIENCEย 

๐ŸŽฏ Essential Requirements

  • ๐Ÿ—๏ธ Hands-on construction background with practical building services experience, rather than a purely consultancy-based career.
  • ๐Ÿšง Proven experience delivering infrastructure and construction projects through all phases of delivery.
  • ๐Ÿ’ท Strong commercial awareness, with a solid understanding of package costs, value management and the ability to challenge Compensation Events (CEs) where required.
  • ๐Ÿ“‹ Extensive experience managing project delivery under NEC4 contracts, including change management, contract administration and stakeholder engagement.
  • ๐Ÿ’ป Strong IT skills and proficiency in project management and reporting tools.

โญ Desirable Experience

  • ๐Ÿญ Experience managing projects within complex live operational or highly regulated environments.
  • ๐Ÿ“‘ Strong understanding of governance and the importance of following due process within regulated facilities.
  • ๐Ÿค Experience working within collaborative, multi-disciplinary teams and contractor environments.
  • ๐Ÿ”„ Flexible and adaptable, with the ability to respond to changing project priorities and requirements.
  • ๐Ÿ“ˆ Good understanding of project planning, Gantt charts and critical path analysis.
  • ๐Ÿ› ๏ธ Experience using CEMAR or similar contract management systems.

๐ŸŽ“ Qualifications & Training

โœ… Essential

  • ๐Ÿ“š Demonstrable experience working under NEC4 contracts.
  • ๐Ÿ—๏ธ Minimum 10 years' construction and commissioning experience.
  • ๐Ÿ‘จโ€๐Ÿ’ผ At least 5 years in a project management or leadership role.

โญ Desirable

  • ๐Ÿ… Membership of a relevant professional body.
  • ๐ŸŒ‰ Civil Engineering background.
  • ๐Ÿ“– NEC Project Manager accreditation or formal NEC training.

Additional Information

Why Join the Switchers Community?

๐Ÿ”นA dynamic career management policy to enable our employees to progress through our five business lines: operations, project, technical, sales and support functions

๐Ÿ”นProvide opportunities to work on exciting, global projects

๐Ÿ”นAccess to an employee assistance programme with free mindfulness, health, wellbeing resources and a confidential support line available 24/7 via phone or text

๐Ÿ”นDiscount vouchers for days out and restaurants, eye test and glasses vouchers, cycle to work scheme, free flu jabs

๐Ÿ”นEnhanced sick pay

Staff orย Umbrella contractor role

SC Clearance required to start

Must be available to work at Client Site full timeย 

NOTICE TO CANDIDATES ON RECRUITMENT FRAUD - We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our peopleโ€™s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

Frequently Asked Questions

Is the salary disclosed for the Principal/Senior Project Manager position at assystem?
The salary for this Principal/Senior Project Manager role at assystem is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Principal/Senior Project Manager position at assystem located?
This Principal/Senior Project Manager role at assystem is based in gb, Helensburgh, Helensburgh, Scotland, United Kingdom, Scotland. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Principal/Senior Project Manager role at assystem full-time or part-time?
This is listed as a Full time position. It is posted as a Principal/Senior Project Manager role at assystem.
How do I apply for the Principal/Senior Project Manager position at assystem?
Click the "Apply Now" button on this page. You will be redirected to assystem's official application portal hosted on smartrecruiters where you can submit your application directly.
When was the Principal/Senior Project Manager job at assystem posted?
This Principal/Senior Project Manager position at assystem was posted on Aug 5, 2026. Apply as soon as possible โ€” early applications are often reviewed first.
Principal/Senior Project Manager
assystem
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