Field Service Engineer

Hernshead Recruitment Ltd; City Of London; On-site; GBP 30,000 - 40,000; Full time

Job summary

A leading renewable energy company is seeking a skilled technician to maintain gas reciprocating engines across the South East. Ideal candidates will have NVQ Level 3 in Engineering, significant experience with gas engines, and strong diagnostic skills. The position offers competitive salary, bonuses, company van, and comprehensive benefits including annual leave and pension contributions.

Benefits

Competitive salary

Up to 15% bonus

Company van & fuel card

Domestic solar funding scheme

Employee Assistance Programme

Cycle-to-work scheme

25 days annual leave

Company pension scheme

Qualifications

• Experience working on gas reciprocating engines (Jenbacher, MWM, MTU, Deutz or Caterpillar).
• Experience with low-voltage electrical systems is beneficial.
• Full UK manual driving licence is required.

Responsibilities

• Perform preventive maintenance and engine overhauls.
• Conduct diagnostics on assets to prevent breakdowns.
• Respond to out-of-hours callouts.

Skills

Fault-finding skills

Safety-consciousness

Experience with gas reciprocating engines

Strong diagnostic skills

Education

NVQ Level 3 or City & Guilds in Electrical or Mechanical Engineering

Tools

Company van

Tools and uniform

Laptop

Mobile phone

Job description

About us

My client is the UK's leading renewable energy generator of low‑carbon power from captured methane. They convert methane gas from landfill sites and disused mines into electricity.

About the Role

• Join their expert operations team and play a pivotal role in ensuring the safe, efficient, and reliable operations of their gas reciprocating engines and associated plant equipment. You will play a key role in identifying early signs of faults, conducting diagnostics, and carrying out both reactive and planned maintenance to minimise engine downtime across our range of site‑based power generation plants. This ensures their fleet operates at peak performance, supporting the continuous delivery of flexible power generation.
• Working in a collaborative, safety‑first environment, you'll contribute to operational excellence and innovation. Ideally, you'll bring experience in power generation or industrial maintenance—particularly with gas reciprocating engines—and demonstrate strong fault‑finding skills and a proactive approach. If you have hands‑on experience stripping and rebuilding engines across agricultural, marine, or industrial sectors, they still want to hear from you.
• Location: This role will primarily serve sites in the Aylesbury and Beaconsfield area, Monday‑Friday, day shift only, with a 1/8 paid call‑out week, where you would cover sites anywhere in the region.

Key Responsibilities

• Adhere to HSQE regulations, report incidents, and take proactive measures to prevent accidents or compliance breaches.
• Perform preventive, corrective, and reactive maintenance, including engine overhauls, to ensure the safe and efficient operation of our sites.
• Conduct diagnostics and troubleshooting on assets experiencing recurring trips or performance challenges to prevent engine downtime or breakdowns.
• Respond promptly to out‑of‑hours callouts, effectively diagnosing and restoring equipment functionality.
• Ensure all tasks assigned by the Operations Performance Team are completed safely, efficiently, and to the highest standards.
• Complete detailed service reports of site visits, ensuring compliance with company protocols.
• Manage van stock inventory, book out parts used, and ensure tools remain calibrated and in safe working order.
• Engage in a culture of continuous improvement, attending training courses and contributing to operational innovation.

About you

• NVQ Level 3 or City & Guilds in Electrical or Mechanical Engineering, or apprentice‑trained in a similar mechanical discipline.
• Safety‑conscious with a proactive approach to health and safety.
• Proven experience working on gas reciprocating engines (Jenbacher, MWM, MTU, Deutz or Caterpillar) or any power generation assets.
• Experience working on low‑voltage electrical systems would be beneficial.
• Strong diagnostic and fault‑finding skills.
• Full UK manual driving licence, preferably with field‑based experience.
• Ability to travel to sites across the South East region during call‑out week.

What they offer

• Competitive salary with up to 15 % bonus, paid quarterly & annually.
• Company van & fuel card, plus tools, uniform, laptop, and mobile phone.
• Domestic solar, battery, and EV charger funding scheme.
• Employee Assistance Programme offering virtual GP appointments.
• Cycle‑to‑work scheme and eye‑care vouchers.
• Community volunteering days to give back to the local area.
• 25 days of annual leave, plus bank holidays.
• Company pension scheme with 6 % employer contribution.
• Sick pay eligibility after a qualifying period.