Planner
Confirmed on the employer's own hiring board on Sep 26, 2026. First seen by Alion on Sep 23, 2026. Assystem scores B on the Alion truth index.
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.
Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.
As the Assystem’s Defence Infrastructure account continues to grow, we are looking to recruit a dynamic, self-motivated Project Planner to support project delivery.
Working alongside the Defence Infrastructure Project Manager(s) and PMO function, the Project Planner is the local point for all aspects of planning across the Defence Infrastructure portfolio.
This role will be based at our Assystem offices in either Derby or Newcastle, with ad-hoc travel to client and other Assystem offices as required. Assystem are currently implementing our ‘new normal’ flexible working model, which will continue to support a mixture of home and office working across the business.
Your missions:
Responsible for planning - production and management of project schedule(s), both internally and externally.
Coordination of work packages to schedule, tracking progress vs schedule, resource planning, coordination of sub-contractors.
Review and approval of sub-contractor programmes.
Interface with stakeholders to identify and report on progress, change, risks and opportunities.
Input to proposals relating to manhour estimates and planning.
Produce concise, accurate reports of project metrics including critical path analysis to the Defence Infrastructure Lead Team.
Why join the community of Switchers?
As one of the Top 3 Nuclear Engineering companies in the world, Assystem offer a competitive benefits package which includes:
25 days of annual leave + bank holidays
8% company pension contributions
Healthcare cash-plan to get money back on dental, medical, physical care
Employee assistance programme including 24/7 access to free mental health support, virtual gym classes and more
Get professional and industry membership fees paid for.
Essential skills and behaviours
Primavera P6 to intermediate level (essential)
Strong skills in MS Office, especially Excel and Project
Self-motivated and able to work to deadlines without direction/supervision
Good communicator able to provide a clear, concise and accurate summary of project progress, risks to the critical path and metrics
Able to confidently engage with sub-contractors and critically review the accuracy of sub-contractor submissions
Attention to detail
Qualifications
Degree preferred, or other equivalent qualification
Primavera P6 training
Project Management qualification (e.g. APM) would benefit
Experience
Experience as a project planner on NEC4 Contracts is essential (particularly Option A and Option C)
Major infrastructure design and build project background highly desirable
Experience of working in the Nuclear or Defence Industry is highly desirable
Please be aware that many roles at Assystem are subject to both security and export control restrictions.
- These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation.
- All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks.
We will consider Inside IR35 Contractors or permanent staff.
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 people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.
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.
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 people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.