Mechanical Assembler – Sub Assemblies Location: Near Uxbridge, West London Salary: £35,593 + overtime {5+ hours per week available} Interview Process: One-stage, onsite Start Date: ASAP Syntech Recruitment is working for a UK aerospace and defence manufacturer, renowned for producing high-precision components. This is an excellent opportunity to join a clean, modern manufacturing facility offering long-term stability and development. We are recruiting a Precision Mechanical Assembler to support the build of kit-of-parts assemblies and complex mechanical sub-assemblies, where accuracy, repeatability, inspection discipline, and traceability are essential. Why join? * £35,593 (depending on experience) * Overtime paid at 1.5x (typically 5–10 hours per week) * Fantastic company pension scheme * Healthcare plan * Early Friday finish for improved work–life balance * Opportunity to work on aerospace-grade precision components * Clean, modern working environment * Long-term role with development opportunities Mechanical Assembler Duties * Assemble precision mechanical kits and sub-assemblies to defined specifications * Build assemblies using M3+ fasteners, fittings, and mechanical components * Work accurately from engineering drawings, technical specifications, and work instructions * Use hand tools including torque wrenches, sockets, hex keys, screwdrivers, and pliers * Apply correct torque settings and assembly sequences * Carry out self-inspection using measuring equipment and Go / No-Go gauges * Support pressure testing or leak testing activities where required * Ensure all builds meet quality, safety, and documentation standards * Record build progress, inspection results, and traceability using MRP / ERP systems (SAP desirable) * Support continuous improvement, 5S, and safe working practices Mechanical Assembler Profile * Minimum 3 years’ experience in precision mechanical assembly * Proven experience building kit-of-parts or mechanical sub-assemblies * Confident reading and working from engineering drawings and specifications * Comfortable using hand tools for accurate, repeatable builds * Experience with inspection tools and gauges (Go / No-Go, basic measurement) * Understanding of mechanical tolerances and quality requirements * Basic computer literacy and experience using ERP / MRP systems * High attention to detail and a quality-first, disciplined approach Simply apply today to speak to one of our consultants. Please note: candidates must be available to attend interviews in early January to be considered for this position. All candidates will go through a base line security vetting process (BPSS) before employment commences