The Role
We are seeking an experienced High Voltage Battery Engineer with hands‑on expertise in EV and/or BESS battery systems.
This is a practical, site‑based engineering role focused on the diagnosis, repair, safe isolation, dismantling, and handling of high‑voltage lithium‑ion battery systems (400V-1000V+ DC).
You will operate as the HV technical authority on site, ensuring safety, compliance, and best practice across all projects.
Key Responsibilities
* Diagnose, repair, dismantle, and rework lithium‑ion battery packs used in EVs and BESS units
* Carry out safe isolation and discharge of HV systems (typically 400V-1000V+ DC)
* Identify faults at cell, module, pack, and BMS level within containerised and cabinet-based BESS systems
Essential Requirements
High Voltage Battery Experience
* Minimum 3 years' hands‑on experience working with high‑voltage lithium-ion battery systems
* Direct experience with EV battery packs and/or BESS units
* Proven ability to diagnose, repair, or dismantle HV battery systems
* Experience working under formal HV safety rules and permit‑to‑work systems
Technical Knowledge
Strong understanding of:
* Lithium‑ion battery architecture (cell / module / pack)
* Battery Management Systems (BMS)
* HV isolation, testing, and fault‑finding
* Containerised and cabinet-based BESS architectures
* IEC, BS EN, and ISO 45001 standards
Desirable
* Experience working with large‑scale BESS units
* HV Authorised Person (AP) status or equivalent
* Background in recycling or end‑of‑life processing of EV or BESS batteries
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