Assembly Line Supervisor

Salary up to £37,000 DOE

Location: Merthyr Tydfil, South Wales

Starting: July 2026

The Assembly Line Supervisor is responsible for the fitting of machined parts, sheet metal brackets, pipework, pumps and valves in accordance with engineering drawings, technical specifications, and quality standards. Working as part of a multidisciplinary production team, the Assembly Line Supervisor ensures all work is carried out to the highest professional and technical standards while maintaining a strong focus on safety and continuous improvement.

Your responsibilities in this role include:

• Ensure all work is completed in line with the agreed production schedule and daily build plan.
• Use appropriate hand tools and assembly equipment safely and effectively.
• Identify and report build issues, defects, or deviations from specification to the Production Manager.
• Assist with any fault finding and rectification during build and test activities.
• Ensure all assembly work is completed to a high standard and ready for inspection or testing.
• Carry out all tasks in accordance with safe systems of work and health and safety procedures.
• Ensure appropriate use of Personal Protective Equipment (PPE) at all times.
• Identify hazards and report any unsafe conditions, incidents, or near misses.
• Maintain a safe, clean, and organised working environment in line with 5S principles.
• Support the company's commitment to maintaining a safe production environment.
• Ensure all assembly installations comply with engineering drawings, technical specifications, and company standards.
• Complete all build documentation, check sheets, and quality records accurately.
• Support quality inspections and testing processes.
• Identify non-conformances and assist with corrective actions where required.
• Maintain high standards of workmanship to ensure right-first-time build quality.
• Actively support continuous improvement initiatives within the manufacturing environment.
• Identify opportunities to improve electrical installation processes, efficiency, and build quality.
• Participate in Lean activities including 5S, standard work, and waste reduction initiatives.
• Support improvements that enhance safety, productivity and delivery performance.
• Carry out assembly/installation work within the scope of approved engineering documentation.
• Raise technical or quality concerns to the production manager where required.
• Provide feedback on build processes and potential improvements.
• Support resolution of build issues during production builds.

Apply if you have most of the following:

• Experience working in a production, assembly, or vehicle build environment.
• Experience interpreting technical drawings.
• Experience working within a regulated or quality-controlled manufacturing environment - desirable.
• Previous experience in an assembly environment where quality and schedule compliance were key.
• Preferably worked within an organisation that practiced continuous improvement.
• Skills necessary to support clear and concise verbal and written communication.
• The ability to accurately follow detailed work instructions and specifications.
• Be fully conversant and able to interpret technical drawings.
• The ability to work in confined spaces for completion of the product.

Additional local needs:

• Full time working onsite would be required.
• Successful candidate would be required to complete a BPSS check.

Marshall Land Systems is a Canadian-owned global company with an unrivalled pedigree of British engineering excellence. From its origins in Cambridge, UK, through more than a century of innovation, pioneering advances from the nose of Concorde to the early Hydrogen fuel cell technology that ultimately powered the moon landings, Marshall engineers now continue to innovate specialist vehicles and infrastructure for NATO forces across the world. From bomb disposal vehicles to deployed shelters, from command and control to CT scanners on the battlefield, Marshall Land Systems protects people in critical situations with the very best in engineering. It employs 600 people with major facilities in the UK, Canada, and the Netherlands.