Jobs

Technical Site Manager – Battery Energy Storage Systems (BESS)
The Site Manager is responsible for the safe, compliant, and reliable operation of a portfolio of Battery Energy Storage Systems (BESS) across the UK. The role has ownership of technical and project management activities for a designated BESS manufacturer, with full training provided.
This position combines hands-on site leadership, technical coordination, and contractor management to maximise asset availability, optimise performance, and protect long-term value. The Technical Manager will also support the wider Technical Asset Management team as required.
Acting as the primary technical authority on site, the role owns day-to-day operational delivery, drives continuous improvement, and ensures all activities meet the highest standards of health, safety, quality, and customer satisfaction. Key Responsibilities & Accountabilities
Safety & Compliance

• Champion a strong safety culture and ensure full compliance with UK HSE legislation, company policies, and OEM requirements.
• Ensure all safety observations, incidents, and near misses are accurately recorded in EHS / incident management systems and closed out effectively.
• Enforce approved troubleshooting processes, method statements, risk assessments, and service procedures for all site activities.
• Manage contractors in accordance with safe systems of work, permit-to-work processes, and standard work instructions.
• Support audits, inspections, and regulatory visits, implementing corrective actions where required.

Service Management

• Own the execution of Long-Term Service Agreements (LTSAs) across a portfolio of BESS assets, ensuring delivery against contractual KPIs including availability, response times, quality, and cost.
• Perform and/or supervise warranty and contracted services onsite, ensuring work is delivered safely, on time, and to high technical standards.
• Plan and oversee preventative maintenance activities in alignment with OEM requirements and asset strategies.
• Lead onsite response to complex technical issues involving BMS, SCADA/DAS, HVAC, and auxiliary systems.
• Support the development and implementation of spares strategies to minimise downtime.

Customer & Stakeholder Management

• Act as the primary onsite point of contact for customers, landowners, and key stakeholders, representing the organisation professionally at all times.
• Advocate customer interests internally, ensuring issues are prioritised and resolved effectively.
• Track, document, and manage customer issues from initial occurrence through to resolution, maintaining clear communication throughout.
• Ensure OEM processes are followed when performing reactive or preventative maintenance activities.
• Track and report site availability, including planned and unplanned outages, deratings, and excused/unexcused events.

Technical Coordination

• Proactively investigate technical issues using SCADA/DAS, equipment logs, event records, and performance data to identify root causes and recurring trends.
• Interface with internal specialist teams (e.g. Software, SDC, RMDC, Supply Chain) to coordinate technical support, configuration changes, and system upgrades.
• Escalate delays, recurring faults, and high-impact issues to Senior Service Engineers or Engineering Management in a timely and structured manner.
• Schedule and coordinate approved contractors for corrective and preventative works, ensuring clear scope definition, documentation, and handover.

Project & Work Management

• Develop and implement site-level project plans for maintenance campaigns, upgrades, retrofits, and corrective works.
• Coordinate daily activities, ensuring appropriate resources, access arrangements, permits, and tools are in place.
• Review and verify contractor invoices and timesheets, ensuring alignment with agreed scope and rates prior to approval.
• Contribute to budgeting and forecasting for operational expenditure (O&M) and capital interventions across the BESS portfolio.

Continuous Improvement

• Promote a continuous improvement mindset across all site activities.
• Identify opportunities to enhance procedures, documentation, tools, and safety practices; propose and implement improvements where appropriate.
• Capture lessons learned from incidents, outages, and projects, feeding insights back into standard work, training, and design improvements.
• Support the development of standardised KPIs and dashboards for performance, availability, and maintenance effectiveness.

Skills & Experience
Essential

• Degree in Electrical or Electronic Engineering (or related discipline), or equivalent technical qualification with 5+ years’ experience in the power or energy sector.
• Strong technical knowledge of MBMUs, BMS, HV/LV systems, protection, PCS/inverters, and control systems—ideally within BESS, solar, or grid-scale assets.
• Proven experience in site-based operations, field service, or asset management roles, including contractor supervision.
• Ability to prioritise tasks, manage multiple workstreams, and make sound risk-based decisions under time pressure.
• Strong communication and stakeholder management skills, including customer-facing experience.
• Comfortable working with SCADA/DAS, equipment logs, and performance data for diagnostics and decision-making.
• Solid understanding of health & safety legislation, permit-to-work systems, and safe systems of work (e.g. HV switching, lock-out/tag-out).

Desirable

• Experience operating or maintaining grid-scale BESS or large solar/wind assets.
• Experience working with OEMs and LTSAs, including warranty and performance management.
• Familiarity with remote monitoring platforms (e.g. Power Factors, GPM, or similar).
• Project management experience including planning, scheduling, and financial control.
• Demonstrated ability to lead, mentor, or support technicians and site teams.

Certifications (Required / Preferred)

• IOSH Managing Safely or equivalent (NEBOSH preferred).
• First Aid at Work and/or Electrical Safety training.
• Full UK driving licence and willingness to travel to remote sites nationwide.

Personal Attributes

• Strong aptitude for learning and sharing knowledge.
• Collaborative team player with the ability to work independently.
• Performs effectively under pressure and tight deadlines.
• Curious, rigorous, well-organised, and detail-oriented.
• Reliable, committed, and thorough in execution.
• Proactive, driven, and motivated to add value.
• Comfortable working in a fast-paced environment with competing priorities.
• Strong analytical capability with the ability to distil complex information quickly.
• Adaptable communicator, effective across all levels of the organisation.

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