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Job Description

Role: Commissioning Engineer – Battery Energy Storage (BESS)

Location: North London/Essex - Site based

Type: Contract

Rate: Up to £550 p/d

MDE Group are working with a global leader in renewable energy and energy storage solutions to support the growth of their UK delivery team.

We are looking for Commissioning Engineers with experience in Battery Energy Storage Systems (BESS) to support installation, commissioning, and troubleshooting activities across multiple project sites.

Key Responsibilities

Carry out installation and commissioning of battery energy storage systems in line with technical requirements

Perform testing, debugging, and fault finding on BESS equipment (including inverters, PCS, and associated systems)

Support site planning and coordination of commissioning activities

Troubleshoot and resolve system issues to restore performance efficiently

Assist with maintenance and technical upgrades of energy storage systems

Work closely with internal teams and international engineering support functions

Requirements

2+ years’ experience in BESS commissioning or similar energy storage projects

Strong background in electrical engineering, HV/LV systems, or power electronics

Experience with on-site commissioning, testing, and fault finding

Relevant certifications such as CSCS, IOSH, NEBOSH, SMSTS, or equivalent

HV/LV authorisation or electrical qualifications highly desirable

Strong communication skills and ability to work in a site-based, hands-on environment

Proficient in standard office/software tools

Willingness to travel and work on projects across multiple locations

Desirable

Experience working with battery OEMs or inverter systems

Exposure to international teams or projects

What’s on Offer

Opportunity to work on cutting-edge energy storage projects

Join a fast-growing sector at the forefront of the energy transition

Competitive rate + benefits + career progression

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