Supply Planner in Cambridge

As a Supply Planner, you will play a key role in building and scaling the planning function within a fast-growing, highly regulated defence environment. You will take ownership of supply planning, material availability, and system-driven planning processes, ensuring production is supported with the right materials at the right time.

Working closely with procurement, manufacturing, and engineering teams, you will manage planning systems, maintain data integrity, and introduce scalable planning logic – balancing startup agility with the rigour required in a security-conscious, export-controlled setting.

• Own end-to-end supply planning activity across production and development, ensuring material availability supports build schedules and delivery commitments.
• Operate and optimise advanced planning systems (APS), managing supply/demand balancing, planning parameters, and scenario modelling.
• Maintain and continuously improve planning master data (lead times, safety stock, order policies, sourcing rules), ensuring accuracy and system trust.
• Define and manage planning rules and logic that underpin MRP/APS outputs, adapting to changing production and engineering requirements.
• Work closely with procurement, engineering, and manufacturing to align supply plans with technical changes, NPI activity, and production constraints.
• Identify supply risks early (capacity, lead time, single-source exposure) and drive mitigation actions to maintain continuity of supply.
• Support the structuring of supply chain data and processes to enable scalable, system-driven planning rather than manual intervention.
• Operate effectively within a security-conscious environment, ensuring appropriate handling, segregation, and access control of sensitive programmes, suppliers, and materials.

• Proven experience in a Supply Planner, Production Planner, or Materials Planner role within engineering-led or complex manufacturing environments.
• Strong hands-on experience with APS tools such as Kinaxis, Manugistics, or similar advanced planning systems.
• Deep understanding of MRP/APS concepts including supply/demand balancing, planning horizons, and constraint-based planning.
• Experience maintaining and improving planning master data, including lead times, safety stock, planning policies, and sourcing rules.
• Ability to define, challenge, and evolve planning logic and system rules, rather than operating purely transactional planning processes.
• Comfortable working in fast-moving or scaling organisations, balancing structure with ambiguity and rapid change.
• Experience operating in security-conscious or regulated environments, with an understanding of how to appropriately manage and compartmentalise sensitive information, programmes, or supply chains (e.g. controlled access, data separation, need-to-know principles).
• Strong cross-functional collaboration skills, with the ability to align planning outputs to engineering, procurement, and production realities.

• Experience implementing or scaling APS/MRP systems in a startup or high-growth environment.
• Exposure to defence, aerospace, or other regulated industries with export-controlled supply chains.
• Experience supporting NPI/MPI environments where planning needs to adapt to rapid engineering change.

• Competitive compensation and stock options.
• Private Medical & Dental.
• Cycle to work scheme.

The mission of Cambridge Aerospace is to eliminate the risk of existential war in Europe. That risk comes from the air – low-cost drones and cruise missiles now manufactured in colossal volumes by our adversaries, ballistic missiles capable of ending the world as we know it, and a new generation of hypersonic weapons that evade every existing defence.

We’re building low-cost interceptors that defeat these threats, and the surveillance systems to detect and target them – at a cost taxpayers can afford, at the pace the threat demands, and with sovereign supply chains that assure delivery.

We have immense backing from the world’s best venture funds. We’re one of the fastest growing defence technology companies in history. And we’re hiring the best engineers to prosecute the mission.

If you are in the top 1%, willing to work harder than you ever have, build technology better than anyone else, and contribute to the defining challenge of our time, now is the time to join us.

Our Commitment to Inclusion: We’re committed to building a diverse and inclusive workplace. If you’re excited about this role but don’t meet every requirement, we still encourage you to apply.