Principal Mechanical Engineer

Principal Mechanical Engineer - Complex Systems

We are working with a highly innovative engineering company seeking a Principal Mechanical Engineer with a proven track record in designing, developing, and delivering complex, multi-component mechanical systems. This is a senior, hands‑on role for an engineer who has previously operated at a principal or senior engineering level, combining technical ownership, design leadership, and mentoring responsibilities.

This position will lead across the full product lifecycle, including concept development, 3D CAD modelling, assemblies, FEA/structural analysis, prototyping, testing, and production release, while setting engineering standards and supporting the development of other engineers.

• Lead the end‑to‑end mechanical design of high‑spec, multi‑part systems, ensuring solutions are robust, reliable, and manufacturable
• Provide technical ownership and direction across projects, including design strategy, risk mitigation, and problem‑solving
• Mentor and support other mechanical engineers, driving best practice, design reviews, and engineering standards
• Produce and maintain high‑quality technical documentation, including CAD models, detailed drawings, BOMs, design calculations, and test reports
• Collaborate closely with cross‑functional teams including electronics, software, and systems engineering to deliver integrated solutions
• Balance your own hands‑on design work with reviewing and guiding wider project deliverables

• Proven experience at a Principal or Senior Mechanical Engineer level, delivering complex, high‑spec mechanical systems
• Expertise in full lifecycle mechanical engineering from concept, design, FEA/structural analysis, prototyping, testing, and production handover
• Strong experience in 3D CAD modelling and assemblies (e.g., Creo, Solid Works, Catia, Autodesk Inventor)
• Experience with PLM systems (Teamcenter, Windchill, or similar) and managing BOMs, drawings, and technical documentation
• Knowledge of manufacturing processes, DFMA, tolerance analysis, and design for reliability
• Proven track record of mentoring engineers, leading design teams, and setting engineering standards
• Hands‑on, practical approach with problem‑solving, troubleshooting, and innovation in complex mechanical assemblies

• Experience in sectors such as defence, aerospace, offshore, renewable energy, industrial machinery, or high‑precision systems
• Familiarity with mechanical testing, prototyping, verification, and validation processes
• Comfortable delivering results in fast‑paced, project‑driven environments with tight deadlines and budgets

This is a rare opportunity to combine technical leadership with hands‑on mechanical engineering ownership, shaping the design of complex systems while mentoring other engineers. You will play a key role in taking product to the next level of conception, creating a fully tested, operational system.