Principal Mechanical Engineer (Permanent) in Norfolk, Norwich

Principal Mechanical Engineer We’re working with an innovative engineering business developing advanced technology for the next generation of electrified and high-performance mobility. As the business continues to expand its engineering capabilities, they are looking for an experienced Principal Mechanical Engineer to join the team and take ownership of the mechanical design, thermal performance and physical integration of complex electromechanical systems. This is a highly technical role spanning the full development lifecycle — from initial concept and detailed design through analysis, testing, validation and production readiness. Leading the mechanical design and physical integration of complex electromechanical systems. Developing rotating assemblies, retention systems, shafts, bearings and housings. Working with permanent magnet, flux management, winding and insulation technologies. Working closely with electromagnetic and controls engineers to translate performance targets into practical, manufacturable designs. Leading and contributing to mechanical, thermal and dynamic analysis, including stress, deformation, rotor dynamics, balance, vibration and heat flow. Leading FMEA, failure analysis, root-cause investigations and corrective actions. Reviewing test data to validate design intent and drive design improvements. Ensuring designs are suitable for manufacture and production scale-up, considering assembly, tooling, materials, supply chain and cost. Supporting internal and customer-facing activities, communicating technical decisions, trade-offs and performance outcomes. We’re looking for an experienced Mechanical Engineer who has worked on complex rotating or electromechanical systems, ideally within automotive, motorsport, aerospace, defence or another high-performance engineering environment. Strong experience in the mechanical design of high-performance rotating or electromechanical systems. Experience with high-speed rotating assemblies and retention systems. Practical experience of build, testing and validation. Experience leading or contributing to FMEA and failure analysis. Experience with mechanical and thermal analysis tools. The ability to balance performance, durability, manufacturability and cost. Experience working within multidisciplinary engineering teams. A structured, evidence-based approach to engineering decision-making. An Engineering Degree or equivalent professional accreditation. Willingness to travel when required to meet business and customer needs. This is an exciting opportunity to join a high-performance engineering business working at the forefront of electrified mobility and advanced motion-control technology. You’ll have genuine technical ownership across the complete product development lifecycle, working alongside engineers across mechanical, thermal, electrical, controls and test disciplines. If you’re a Principal or highly experienced Mechanical Engineer looking for a technically challenging role where you can influence the design of next-generation technology, this could be an excellent opportunity.