BESS O&M Service Engineer

Vallum Associates; Greater London; Hybrid; GBP 55,000 - 75,000; Full time

Job summary

Vallum Associates seeks a Battery Energy Storage Systems (BESS) operations and maintenance engineer to oversee site-based and remote activities across Oxfordshire and Southampton. Responsibilities include maintenance, diagnostics, commissioning support, and safety compliance.

The role requires an electrical engineering qualification and experience in renewable energy, with strong knowledge of LV systems, inverters and battery technology. Travel between sites is expected.

Qualifications

• Electrical engineering qualification is essential.
• Experience within renewable energy, power generation, utilities or related sectors.
• Knowledge of LV systems, inverters, energy management systems and battery technology.
• HV operational experience is desirable.

Responsibilities

• Conduct preventive and corrective maintenance on BESS assets and associated infrastructure.
• Perform remote and on-site diagnostics, inspections and troubleshooting activities.
• Support commissioning activities, system upgrades and major repairs.
• Ensure compliance with Health & Safety regulations and site procedures.
• Supervise subcontractors and monitor quality of third-party works.
• Review maintenance documentation, RAMS and operational procedures.
• Support annual maintenance planning and coordination with OEM suppliers.
• Participate in on-call support for urgent site issues outside normal working hours.

Skills

LV systems

Inverters

Energy management

Battery technology

Renewable energy experience

Education

Electrical engineering qualification

Job description

Location: South UK (covering Oxfordshire and Southampton sites)

Type: Permanent

Reporting to: Technical Director (UK)

About the Role - Battery Energy storage system operations and maintenance

The successful candidate will be responsible for the operation and maintenance of utility-scale Battery Energy Storage Systems, ensuring safe, reliable and efficient performance. The role combines field-based activities with home-office working and involves troubleshooting, inspections, performance optimisation, maintenance planning and emergency response support.

This is an excellent opportunity to join a business experiencing significant growth within the energy transition sector and to contribute to the long-term success of major BESS projects.

Key Responsibilities

• Conduct preventive and corrective maintenance on BESS assets and associated infrastructure.
• Perform remote and on-site diagnostics, inspections and troubleshooting activities.
• Support commissioning activities, system upgrades and major repairs.
• Ensure compliance with Health & Safety regulations and site procedures.
• Supervise subcontractors and monitor quality of third-party works.
• Review maintenance documentation, reports, RAMS and operational procedures.
• Support annual maintenance planning and coordination with OEM suppliers.
• Participate in on-call support for urgent site issues outside normal working hours.

Candidate Requirements

• Electrical engineering qualification is essential.
• Experience within renewable energy, power generation, utilities or related sectors.
• Strong understanding of LV systems, inverters, energy management systems and battery technology.
• ECS/CSCS card, or eligibility to obtain one.
• Knowledge of UK HSE regulations and safe working practices.
• Full UK driving licence and willingness to travel between sites.
• Experience within BESS or energy storage projects would be highly advantageous.
• HV operational experience is desirable.

Additional Information

• The role is predominantly site-based, with home-office working when not on site.
• Coverage is required across two locations: Oxfordshire and Southampton. Candidates based in London or near either site would be particularly well positioned.
• Sites operate 24/7, and occasional weekend work may be required to address urgent operational issues.
• The projects are expected to run for approximately 8-12 years, providing excellent long-term career stability.
• Competitive salary and bonus scheme.
• 25 days annual leave plus bank holidays.
• Flexible working arrangements.
• Private medical insurance.
• Pension scheme with matched contributions.
• Car allowance and company vehicle for business travel.
• Ongoing training and development opportunities.