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Home Planning Manager

Our Vacancy

Planning Manager

  • Defence
  • Contracting / Project Management
  • Helensburgh
  • United Kingdom
  • 09/04/26
  • On site
  • Share
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Assystem is an international company with one mission: accelerate the energy transition around the world.


Every day, our 6,500 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy.


We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition.


Drawing on more than 55 years’ experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked third in the world for nuclear engineering.


To ensure a viable, efficient, and reliable energy future for all.


Job Description

Infrastructure Strategic Planning Manager (ISPM)

🚀 Position Overview

We’re looking for a highly analytical and collaborative Infrastructure Strategic Planning Manager (ISPM) to support the development and delivery of integrated infrastructure planning across the client site.

Working closely with the Civil Service Infrastructure Strategic Planning Lead, you’ll play a central role in developing and maintaining the Infrastructure Integrated Plan and Strategic —critical tools that bring together infrastructure projects, maintenance activities, safety case requirements, and operational programmes.

You’ll help create a single, integrated view of infrastructure delivery, enabling better decision-making, risk management, and strategic alignment across a complex, highly regulated environment.

🛠️ Key Responsibilities

  • 🤝 Engage and communicate effectively with stakeholders across the community, including site teams
  • 🔧 Collaborate with Engineering and Compliance teams to understand interdependencies across infrastructure activities
  • 📅 Collect and integrate planning data from project, programme, and infrastructure teams into a unified plan
  • 🖥️ Develop and manage Primavera P6 schedules, ensuring accuracy and alignment
  • 📊 Produce and maintain the Infrastructure Integrated Plan (IIP) and Strategic IIP as the “single source of truth”
  • ⚠️ Analyse plans to identify risks, issues, discrepancies, and opportunities, ensuring timely mitigation
  • 🔍 Demonstrate cause-and-effect relationships and run planning/mitigation scenarios
  • 📈 Develop clear, concise planning reports to support informed decision-making
  • 📣 Provide up-to-date reporting on progress, risks, issues, and changes, escalating where required
  • 📝 Prepare reports for governance forums, aligned with reporting cycles (“drumbeats”)
  • 🧩 Support the Planning Forum (CPF) and Strategic Planning Working Group, ensuring effective participation
  • 🎯 Act as a key focal point for Primavera P6 planning activities within the DHI team (alongside the Planning Lead)

 

My profile

Skills / experience required for this role:

  1. MS O365 proficient.
  2. Primavera P6 proficient.
  3. Experienced user of SharpCloud and Power BI.
  4. Strong administration and governance skills.
  5. Effective stakeholder management and engagement at all levels.
  6. Strong presentation and communication skills.
  7. Organised with ability to work on own initiative and be proactive.

Staff or umbrella contract role

SC Clearance to start

Sole UK nationals only

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.

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