CNC Maintenance Engineer

Sigma Engineering Systems Ltd; Northampton; On-site; GBP 32,000 - 46,000; Full time

Job summary

Sigma Engineering Systems Ltd. is seeking a CNC Maintenance Engineer for on-site work in Northampton. You will perform routine and preventive maintenance on CNC machine tools, diagnosing faults and carrying out repairs to keep equipment at peak performance.

The role involves supporting retrofits, responding to urgent maintenance requests, and documenting service work while ensuring safety, quality, and OEM standards are met. Prior CNC experience and a valid driver’s license are advantageous.

Qualifications

• Strong CNC machine tool maintenance skills including mechanical troubleshooting and electrical diagnostics.
• Experience interpreting schematics, service manuals and technical docs.
• Proven ability to plan preventive maintenance and keep accurate records.
• Clear communication to explain issues and coordinate with on-site teams.
• Adherence to health and safety practices around electrical systems and rotating machinery.

Responsibilities

• Perform routine and preventive maintenance on CNC machines to minimize downtime.
• Diagnose faults and carry out repairs and component replacements.
• Support retrofits and upgrades such as control system enhancements and motor changes.
• Respond promptly to urgent maintenance requests and document service work.
• Maintain accurate records of repairs, parts usage and machine performance.
• Collaborate with customers’ technical teams and provide on-site guidance.

Skills

CNC maintenance

Mechanical troubleshooting

Electrical diagnostics

Control systems

Fault finding

Diagnostic tools

CMMS / maintenance logs

Customer communication

Health & safety adherence

Education

NVQ / City & Guilds or equivalent in Mechanical or Electrical Engineering

Tools

CMMS tools

Job description

Company Description Sigma Engineering Systems Ltd is a specialist provider of CNC machinery repair, maintenance, and upgrading services, backed by 12 years of industry experience, including a decade with a market-leading OEM. The company delivers on-site diagnostics and repairs, preventive maintenance programs, emergency support, and machine tool retrofitting to keep equipment operating at peak performance. Sigma offers rapid response, strict quality assurance, and access to high-quality replacement parts to minimize downtime and extend machinery lifespan. Technical support and tailored training are provided to help customers’ teams maintain consistent productivity and performance. With a focus on precision, reliability, and personalized service, Sigma Engineering Systems is a trusted partner for CNC machine tool users.

Role Description The CNC Maintenance Engineer role is a full-time, on-site position based in Northampton. The engineer will perform routine and preventive maintenance on CNC machine tools, including mechanical, electrical, and control system checks, to reduce breakdowns and optimize performance. Day-to-day tasks include diagnosing faults, carrying out repairs and component replacements, and supporting retrofits and upgrades such as control system enhancements and motor changes. The role involves responding to urgent maintenance requests, documenting service work, and maintaining accurate records of repairs, parts usage, and machine performance. The engineer will also collaborate closely with customers’ technical teams, provide basic training and guidance on best maintenance practices, and ensure work is completed in line with safety, quality, and OEM standards.

Qualifications

• Candidates should possess strong CNC machine tool maintenance skills, including mechanical troubleshooting, electrical diagnostics, and familiarity with control systems.
• Candidates should possess skills in fault finding, use of diagnostic tools, and interpreting technical documentation, schematics, and service manuals.
• Candidates should possess competencies in preventive maintenance planning, record-keeping, and using maintenance logs or CMMS tools.
• Candidates should possess effective communication and customer service skills to explain technical issues clearly and collaborate with on-site teams.
• Candidates should possess adherence to health and safety practices, including safe working procedures around electrical systems and rotating machinery.
• Relevant qualifications such as an NVQ, City & Guilds, or equivalent in Mechanical or Electrical Engineering, or a related technical discipline, are beneficial.
• Experience working with CNC machinery, machine tool OEMs, or precision engineering environments is highly advantageous.
• A valid driver’s license and willingness to work on-site at customer facilities in Northampton and nearby areas are beneficial.