BESS O&M Service Engineer

Location: London / Oxfordshire Sites / Hybrid
Contract: Permanent, Full-time

The Opportunity

ARM is recruiting for an experienced BESS O&M Service Engineer to support the operation, maintenance and performance optimisation of utility-scale Battery Energy Storage Systems across the UK.

This is an exciting opportunity to join a growing business within the energy transition sector, ensuring BESS assets operate safely, reliably and efficiently in line with contractual requirements.

The role combines field-based site work, troubleshooting, remote operations and home working, alongside technical documentation, maintenance planning and corrective maintenance support.

Key Responsibilities

• Carry out preventive and corrective maintenance on BESS systems and associated infrastructure.
• Perform remote operations, diagnostics and troubleshooting.
• Conduct site inspections using appropriate tools and test equipment.
• Support safe operation of battery storage systems, PCS/inverters and EMS.
• Ensure compliance with site-specific Health & Safety requirements.
• Supervise subcontractors and ensure third-party works meet quality and compliance standards.
• Support commissioning, upgrades and major repairs.
• Review maintenance documentation, manuals and technical drawings.
• Support development of maintenance procedures, RAMS and Method Statements.
• Work with LTSA management and H&S teams on relevant procedures and documentation.
• Liaise with OEM suppliers regarding maintenance procedures and technical queries.
• Support preparation of annual maintenance plans for BESS projects.
• Provide on-call support for urgent site issues outside normal working hours.

About You

The successful candidate will have:

• A minimum of 2 years' experience in BESS, Energy Storage, Renewables, Solaror the Power sector.
• A degree or equivalent qualification in an engineering discipline.
• Strong knowledge of LV systems, batteries, PCS/inverters and Energy Management Systems.
• Practical experience in BESS Operations & Maintenance.
• ECS/CSCS card or eligibility to obtain one.
• Good knowledge of UK HSE regulations and safe working practices.
• Strong organisational, communication and problem-solving skills.
• A full UK driving licence and willingness to travel to UK sites.
• A proactive and solution-focused approach.
• Flexibility to participate in out-of-hours/on-call coverage.

Experience with HV operations, battery system training or specific PCS/OEM training would be highly advantageous.

If you're an experienced BESS O&M Engineer looking to play a key role in the reliable operation of utility-scale energy storage projects, apply today to discuss the opportunity with ARM.

To apply please contact Simon Cheung by sending your cv