Job Title: Senior Mechanical Design Engineer Special Purpose Machinery Location: Staines-upon-Thames, Surrey Salary: £50,000 to £65,000 basic + benefits Employment Type: Permanent Working Arrangements: On-Site A leading engineering organisation in Surrey is seeking a Senior Mechanical Design Engineer to take ownership of complex mechanical systems from concept through to production. This position offers the chance to work on high integrity, performance critical products where innovation, precision, and engineering excellence are central to the work. Key Responsibilities - Senior Mechanical Design Engineer Lead the mechanical design of assemblies and components involving automation/complex moving parts. Produce high quality 3D models and detailed drawings using a modern 3D CAD package (SolidWorks, Creo, Inventor, or similar) Drive concept development, prototyping, testing, and design validation Collaborate with cross functional teams including electronics, manufacturing, and systems engineering Ensure designs meet performance, safety, and compliance requirements About You - Senior Mechanical Design Engineer Proven experience in special purpose machinery with experience of designing automation products/systems. Complex moving parts etc Strong proficiency with 3D CAD tools and engineering documentation standards Solid understanding of materials, tolerances, manufacturing processes, and mechanical engineering best practice Proactive, hands on approach to problem solving ..... full job details .....