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