Senior Mechanical Design Engineer(Tooling) - Siemens NXLocation: Derby (On-site)Sector: Highly Regulated Engineering / Defence / Complex ToolingClearance: British Citizens only - eligibility for UK Security Clearance (SC) requiredThe OpportunityAre you and experienced mechanical design engineer, looking for your next long-term opportunity?We''re delighted to be supporting a major engineering consultancy, delivering complex tooling and mechanical design solutions across highly regulated sectors, as part of a wider framework agreement.Due to significant investment and long-term programme growth, we''re looking for experienced Senior Mechanical Design Engineers, with strong Siemens NX skills and a background in tooling, fixtures, jigs, lifting equipment or precision mechanical systems.Here, you will be joining a powerhouse of the engineering world, working with a talented, multi-disciplinary engineering team, and the chance to collaborate on cutting-edge, meaningful UK programmes with long-term career potential.Key Responsibilities3D modelling and 2D detailing in Siemens NXManaging design data via Teamcenter (PLM)Full lifecycle tooling design: requirements concept DfM releaseProducing assemblies, sub-assemblies, BOMs and detailed drawingsApplying GDandT to ASME Y14.5 / BS standardsSupporting gated design reviews and client presentationsEnsuring compliance with safety legislation and UKCA requirementsWhat You''ll BringEssential:Strong Siemens NX (3D + 2D)Proven tooling / jigs / f