Senior / Principal Electronics EngineerLocation: BristolPermanentMust be SC cleared /EligibleAn innovative aerospace and defence technology organisation is seeking a Senior / Principal Electronics Engineer to lead the development of mission-critical unmanned aerial systems.This is a full-lifecycle role from architecture and schematic capture through to prototyping, flight validation and production release. You’ll play a key role in designing the “nervous system” of advanced aircraft platforms.Key Responsibilities:Architect and design multi-layer PCBs (power, control, high-speed data, sensor interfaces)Lead aircraft electrical integration (wiring looms, interconnects, EMI/EMC robustness)Oversee prototype build, bench validation, and environmental testingIntegrate payloads and mission systems with flight computersDefine engineering standards, DfM principles, and manage component lifecycle/obsolescenceMentor junior engineers and provide technical leadership across projectsRequirements:Degree in Electronic Engineering or related disciplineStrong expertise in PCB design tools (Altium or similar)Deep understanding of power electronics, motor control (BLDC/ESCs), and digital comms (CAN, SPI, I2C, Ethernet)Track record delivering ruggedised or flight-critical hardwareComfortable in hands-on lab environmentsEligible for SC ClearanceThis role suits a technically authoritative engineer who thrives in fast-paced, high-performance development environments and wants to see their designs move from concept to operational deployment.