This role is Outside IR35UK based Remote working Job Title: Senior Mechanical Design Engineer - Electronics Enclosure and Battery Systems Role Overview: The Senior Mechanical Design Engineer will be responsible for the mechanical design of ruggedized enclosures, battery modules, and supporting systems. The ideal candidate has deep expertise in mechanical CAD, materials, and manufacturing techniques for high-reliability applications. This position is ideal for a proactive, detail-oriented engineer who thrives in a collaborative and fast-moving project structure. Key Responsibilities: Develop and manage mechanical designs using Autodesk Fusion 360 or equivalent CAD tools (license required or provided by candidate).Design battery packs and busbars for power systems, ensuring safety, reliability, and thermal performance.Create enclosure designs that meet IP67-IP68 ingress protection requirements.Apply DFM/DFA principles for plastic moulding, sheet metal, and laser welding fabrication.Perform tolerance stack-up analysis and apply electrical clearance and creepage rules.Model cable harnesses and integrate effective strain relief and routing strategies.Select and implement robust fixing methods: adhesives, rivets, welds, mechanical fasteners.Ensure compliance with environmental and mechanical standards including:o Corrosion: AECTP-300 Method 309 o Dust and Sand: AECTP-300 Method 313 o Shock and Vibration: DEF STAN 00-35 (M1-M6) o Rain, Solar, Immersion: AECTP-300 Methods 305, 307, 3