Planning Manager; Sizewell C)

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The Planning Manager leads planning and programme management across major infrastructure works, ensuring projects are effectively planned, monitored, and controlled to achieve delivery milestones, contractual obligations, and client expectations.

The role includes developing integrated programmes, managing progress reporting, assessing risks and opportunities, supporting commercial and operational teams, and providing strategic planning leadership throughout the project lifecycle. Kier is currently delivering major infrastructure works in support of a nuclear-grade power station as part of one of the UK’s largest energy projects. This role will initially support project delivery through to completion, with the opportunity to contribute to future nuclear projects within the Natural Resources, Nuclear and Networks business unit.

Significant experience in infrastructure construction, change management, and impact programme development within an NEC contract environment is essential.

• Develop, maintain, and manage fully integrated project programmes using Primavera P6 and/or Microsoft Project.
• Produce baseline and acceptance programmes aligned to scope, methodology, procurement strategy, and delivery phasing.
• Establish critical path activities and monitor performance against key milestones and contract requirements.
• Lead short- and long-term planning across design, procurement, construction, commissioning, and handover.
• Coordinate programme interfaces across disciplines, subcontractors, and stakeholders.

• Monitor progress and productivity against plan, and produce weekly and monthly reports, dashboards, look-ahead schedules, and programme narratives.
• Analyse delays, assess impact, and develop mitigation, recovery, and acceleration plans.
• Lead earned value, KPI, and project controls reporting, including visual management outputs where applicable.
• Present programme updates and analysis to senior leadership and client representatives.

• Identify programme risks, constraints, and opportunities, and support risk workshops and assurance reviews.
• Assess change impacts, support extension-of-time submissions, and contribute to forecasting and commercial decision-making.
• Resource load and level programmes accurately to support sequencing and delivery decisions.

• Work closely with project managers, engineers, commercial teams, procurement teams, supply chain partners, and clients.
• Mentor and develop planners, and ensure planning standards, governance, and business processes are consistently applied.
• Support bid and tender submissions through programme development, methodology input, logistics strategies, phasing plans, and visual planning outputs.

• Delivery of accurate, contract-compliant programmes and timely programme reporting.
• Achievement of key project milestones and effective management of programme risk and change.
• Continuous improvement in planning standards, reporting quality, and project controls outputs.

• Contribute to team wellbeing and help create an inclusive workplace where diversity of thought, background, and experience is actively encouraged.
• This profile is not exhaustive. From time to time, you may be asked to undertake other tasks within your capabilities, with training and support provided where needed.

• Significant planning experience in infrastructure, major civil engineering, energy,…