Principal Mechanical Design Engineer Complex Electro-Mechanical SystemsAre you an experienced Mechanical Design Engineer ready to take the next step in your career? We are seeking a Principal Mechanical Design Engineer to lead the design and development of complex electro-mechanical systems for highly regulated markets. This is a senior, hands-on role offering technical ownership, leadership, and innovation opportunities.----------------------------------------About the RoleAs a Principal Mechanical Design Engineer, you will:Lead the design, development, and documentation of complex electro-mechanical systemsTake technical ownership of projects from concept through to production, testing, and commissioningMentor and guide junior engineers, providing leadership across multidisciplinary teamsCollaborate closely with electrical, software, and systems engineers to deliver integrated and compliant solutionsSupport continuous improvement initiatives and provide innovative solutions for challenging design problemsAs part of the Mechanical Design team, the Principal Mechanical Design Engineer will provide technical direction for mechanical engineering activities across assigned projects and major work packages, ensuring robust engineering decisions, effective cross-functional delivery, and successful progression through the gated development process. This role combines deep engineering capability with strong delivery leadership. The Principal Mechanical Design Engineer will lead complex problem resolution, guide mechanical decision-making, coordinate technical activities with minimal intervention, and act as a key interface between Mechanical Design and other business functions, suppliers and customers. They will also support and mentor other engineers across the business.The ideal candidate will have significant experience designing complex moving mechanical systems, such as gearboxes, actuators, powertrain systems, rotating machinery, or turbomachinery, bringing proven expertise in tackling high-complexity mechanical challenges.----------------------------------------Key Responsibilities of a Principal Mechanical Design EngineerDeliver robust mechanical designs for electro-mechanical systems used in high-regulated environmentsProduce CAD models, detailed drawings, and Bills of Materials (BOMs) using SolidWorksConduct design reviews, risk assessments, and technical validationManage and optimise design for manufacturability (DfM) and assembly (DfA)Liaise with suppliers and manufacturing teams to ensure designs are practical, cost-effective, and compliantProvide leadership and mentorship to design and engineering teams, fostering technical excellence----------------------------------------Skills & Experience of a Principal Mechanical Design EngineerDegree-qualified in Mechanical Engineering or related disciplineExtensive experience in mechanical design of complex electro-mechanical systemsProven experience designing complex moving mechanical systems (gearboxes, actuators, powertrain systems, rotating machinery, turbomachinery)Strong SolidWorks expertise and CAD modelling capabilitiesProven experience in high-regulated markets, e.g., automotive, aerospace, or defenceStrong understanding of mechanical components, assemblies, tolerance stack-ups, and manufacturing methodsDemonstrated leadership and ability to mentor junior engineersExcellent problem-solving, communication, and organisational skills----------------------------------------Why Apply?Take ownership of high-impact, technically challenging projectsLead and shape the work of a growing, innovative engineering teamWork in an environment that values innovation, quality, and professional growthOpportunity to make a real difference in complex, cutting-edge product development----------------------------------------If you are an experienced Principal Mechanical Design Engineer with a strong track record designing complex electro-mechanical and moving mechanical systems, we want to hear from you.JBRP1_UKTJ