Senior Defence Planner | Primavera P6 Expert

Assystem; Greater London; On-site; GBP 60,000 - 85,000; Full time

Benefits offered by this job

Pension scheme

25 days’ paid annual leave + bank hols

Professional fees reimbursed

Flexible working

Employee referral scheme

Job summary

Assystem is seeking a Senior Planner to develop, maintain, and assure fully integrated schedules for complex defence programmes. The role supports decision-making with accurate planning data, schedule analysis, and risk-informed forecasts aligned with governance and assurance requirements.

Working with Project Managers, Engineering, Commercial, and Risk teams, you will ensure schedules reflect scope, cost, risk, and resources while complying with contractual and regulatory standards.

Qualifications

• Significant experience in project planning within defence, aerospace, engineering, or complex regulated environments.
• Strong proficiency in planning tools such as Primavera P6 (essential).
• British National.
• Experience producing and maintaining integrated master schedules.
• Solid understanding of critical path analysis, schedule logic, and performance measurement.
• Ability to communicate complex planning information clearly to non-planning stakeholders.

Responsibilities

• Develop and maintain integrated, resource- and cost-loaded schedules across the full project lifecycle.
• Establish planning structures aligned to WBS, CBS, and contract deliverables.
• Ensure schedules comply with defence and organisational planning standards and best practice.
• Provide schedule performance analysis including critical path, float, dependencies, and milestones.
• Support Earned Value Management (EVM) and schedule health assessments.
• Produce clear, accurate planning reports for governance and stakeholders.
• Integrate risk, opportunity, and mitigation actions into project schedules.
• Assess schedule impacts of change requests and support change control processes.
• Mentor junior planners and promote planning best practice.
• Contribute to continuous improvement of planning processes, tools, and standards.

Skills

Experience in defence/aerospace/plans

Primavera P6

Stakeholder management

Integrated master scheduling

Clear communication of planning info

Tools

Primavera P6

Job description

Assystem is seeking a Senior Planner to develop, maintain, and assure fully integrated schedules for complex defence programmes. The role supports decision-making with accurate planning data, schedule analysis, and risk-informed forecasts aligned with governance and assurance requirements.

Working with Project Managers, Engineering, Commercial, and Risk teams, you will ensure schedules reflect scope, cost, risk, and resources while complying with contractual and regulatory standards.