Senior Planner

About the Role

At Northrop Grumman UK, you will be part of a team driving innovation to solve tomorrow's challenges and shape future technology solutions. This Senior Project Planner role is more than just a job; it’s a mission to support our PMO and programme teams in delivering some of the UK’s most complex defence projects.

You will be responsible for developing and assuring robust, fully integrated project schedules that shape decision-making at project, programme, and portfolio levels. As a trusted planning partner, you will work closely with Programme and Project Managers, providing authoritative schedule leadership, analysis, and insight to ensure alignment with contractual, commercial, and technical objectives throughout the programme lifecycle.

Key Responsibilities

• Develop, maintain, and control fully integrated master schedules using Primavera P6 for large, multi-workstream defence programmes.
• Ensure schedules are logically linked, baselined, and structured in line with best practice, contractual requirements, and internal governance.
• Provide proactive planning support including critical path analysis, what-if modelling, and recovery planning.
• Identify, analyse, and manage schedule risks and opportunities, integrating mitigations into programme schedules.
• Support bids and proposals by creating compliant, credible Primavera P6 schedules and planning inputs.
• Apply Earned Value Management (EVM) to track schedule performance, support variance analysis, and assess change impacts.
• Conduct and support Schedule Risk Analysis, including quantitative modelling, and present findings to senior stakeholders.
• Produce clear, high-quality schedule performance reports and dashboards for internal and customer reviews.
• Support internal and external audits related to planning, EVM, and risk.
• Collaborate with engineering, supply chain, manufacturing, and commercial teams to maintain schedule integrity.
• Provide mentoring and oversight to junior planners and act as a subject matter expert in Primavera P6, EVM, and schedule risk management.

Essential Experience and Skills

• Significant experience in project planning and scheduling within defence, aerospace, or other complex engineering environments.
• Expert, hands-on knowledge of Primavera P6 for developing and managing integrated master schedules.
• Proven experience applying Earned Value Management to monitor schedule performance.
• Experience conducting Schedule Risk Analysis and interpreting quantitative risk outputs.
• Strong analytical skills with the ability to communicate complex schedule data clearly.
• Experience coordinating integrated schedules across multi-disciplinary teams and suppliers.
• Proficient in Microsoft Office and fluent in written and spoken English.
• Strong interpersonal skills with the ability to engage constructively with diverse stakeholders.

If you meet many, but not all, of these requirements, we still encourage you to apply. We’re committed to developing people and supporting growth within the role.

Security Clearance

Due to the nature of our work, you must be a UK national and able to gain and maintain SC UK Government security clearance.

Benefits

• Flexible and hybrid working options, including the opportunity for a compressed fortnight.
• Private healthcare.
• Cash health plan.
• Holiday buy/sell scheme.
• Career development programmes and professional training.
• Performance-based bonuses.

Why Join Us?

• A Mission to Believe In: Contribute to building a more secure and connected world with real-world impact across the defence and national security landscape.
• A Place to Belong and Thrive: Join an inclusive culture that values every voice, encouraging curiosity, collaboration, and continuous improvement.
• Your Career, Your Way: Shape your career journey with opportunities for development, mentoring, internal mobility, and leadership support.