Piper Maddox are supporting a global aerospace engineering organisation with the hire of a Senior Mechanical Design Engineer to join their RandD Technical function in Buckinghamshire.The business is a recognised leader in aircraft electrical systems and is playing a central role in the electrification of aviation, spanning power generation, distribution, motors and hybrid-electric propulsion technologies.The UK site is a key engineering hub focused on smart motor and power generation technologies, supporting both established aerospace platforms and next-generation electromechanical systems.This is a senior-level mechanical design position with real ownership. You will lead and deliver engineering work packages across RandD and RandT programmes, developing robust mechanical solutions for rotating electrical equipment ensuring designs are technically sound, manufacturable, cost-conscious and aligned to programme milestones.The role blends hands-on design responsibility with technical leadership and cross-functional coordination.Key responsibilities: Developing mechanical design solutions for aerospace motor and power generation technologies Owning or supporting engineering work packages from concept through validation Overseeing and approving design solutions delivered by other engineers Producing and maintaining CAD models, drawings and BOMs to aerospace standards Delivering design assurance documentation, calculations and stress/thermal justification Supporting root cause in