Field Mechanical Engineer at JMG Limited

JMG is a diversified solution provider with a broad portfolio in power generation, electrical infrastructures, and industrial equipment. With over 20 years of experience in Africa and strong partnerships with some of the world’s leading brands, JMG combines global technologies and regional expertise to fulfill the African market's development needs.

We are recruiting to fill the position below:

Job Title: Field Mechanical Engineer

Location: Lagos
Employment Type: Full-time

Job Description

• We are seeking a highly skilled and self-motivated Field Mechanical Engineer to join our Aftersales team.
• In this role, you will be responsible for the troubleshooting, maintenance, repair, and overhaul of diesel and gas generator sets at customer sites.
• You will ensure minimal downtime and maximum efficiency for our clients' critical power systems.
• You must be comfortable working independently, managing a busy service schedule, and diagnosing complex mechanical issues in the field.

Requirements

• Perform routine preventative maintenance on generator sets (oil changes, filter replacements, coolant checks) according to OEM specifications and service schedules.
• Diagnose and repair mechanical faults on diesel engines (e.g., Perkins, Cummins, Deutz, MTU, Caterpillar), alternators, and cooling systems.
• Conduct load bank testing, vibration analysis, and thermographic surveys to ensure system health.
• Overhaul engines and components (cylinder heads, fuel injectors, turbochargers) as required.
• Respond to emergency breakdown calls and provide rapid on-site troubleshooting to restore power.
• Analyze control system alarms and mechanical symptoms to identify root causes of failure.
• Provide technical guidance to clients on generator operation and minor troubleshooting.
• Conduct site surveys to assess installation conditions, fuel quality, and exhaust systems.
• Prepare detailed and accurate service reports, timesheets, and condition reports immediately after each site visit.
• Advise clients on potential issues, recommended repairs, and future service requirements.

Qualifications

• Bachelor’s Degree or Higher National Diploma (HND) in Mechanical Engineering, Marine Engineering, or a related field.
• Must have 5 – 7 years of hands-on experience in servicing and repairing diesel/gas generators (10 kVA – 1000 kVA+).
• Deep understanding of 4-stroke diesel engine principles, alternator construction (AVR function), fuel systems, and cooling systems.
• Valid driver’s license (ability to drive a manual vehicle is essential).
• Proficiency with mechanical diagnostic tools, digital multimeters, and engine control unit (ECU) software is highly desirable.

Application Closing Date
9th April, 2026.