Principal Mechanical Design Engineer

Cyber Business Our Cyber business unit is at the forefront of pioneering advanced cryptographic and key management solutions, facilitating the confidential exchange of vital information for customers operating at both tactical and strategic echelons. Join our team and participate in the innovation that ensures the highest security and trust worldwide. Job Description As a Principal Mechanical Engineer, you will provide technical expertise across the design, development, testing and qualification of mechanical assemblies for advanced security critical products. You will lead mechanical engineering activities from concept through to production, ensuring designs meet functional, environmental and regulatory requirements. Key Responsibilities * Define and manage mechanical design requirements, ensuring validation and verification. * Responsible for developing, documenting and delivering robust mechanical solutions for complex systems using the 3D CAD system and the company engineering toolsets. * Create and peer review technical artefacts, including mechanical design documentation, design data packs, analysis reports, plans and procedures in accordance with our product development framework. * Define, analyse and document predicted mechanical functional behaviours and performance. * Optimize the design of parts based on various manufacturing technologies: machined from solid, injection moulding, extrusion, sheet metal and casting. * Perform tolerance analysis of close tolerance parts and complex assemblies. * Produce mechanical designs for complex systems that meet defence standards MIL-STD and DEF-STAN, EMC and TEMPEST requirements and harsh environmental conditions. * Create and review high-quality drawings to BS8888 standard to guarantee design precision. * Select optimum engineering materials and finishes to suit cost and performance. * Design production jigs and fixtures in conjunction with production engineers. * 3D Print and scan components; and produce rapid prototypes. * Responsible for mechanical test solution and development of test procedures to support the verification of the product. * Liaise with the production and supply chain teams to ensure a seamless transition to manufacture. Essential Skills, Qualification and Experience * Degree in Mechanical Engineering or closely related discipline. * Profound understanding of key mechanical engineering principles e.g. materials science and selection, engineering mechanics, stress analysis, vibration analysis, thermodynamics, heat transfer, assembly techniques and manufacturing processes. * Seasoned experience in hands-on design of complex and rugged electronic enclosures for the defence industry. * Extensive experience of 3D CAD modelling and drafting. Creo CAD version 7 or later is preferable. * Deep technical expertise of undertaking stress and thermal analysis using hand calculations, FEA and CFD. * Long term experience of using PLM systems, preferably Windchill. * Proven track record managing BOMs on PLM systems and interfacing with ERP systems. * Proven ability to multi-task, prioritise workload, and work under pressure to deliver on multiple projects simultaneously. * Meticulous in drafting and reviewing complex engineering drawings to guarantee design precision