Commissioning Engineer m/fd - Saarbrücken

Commissioning Engineer m/fd (Solar PV – Construction & Energisation Focus) · Overview We are seeking a Commissioning Engineer specialising in utility-scale solar PV projects. This role focuses exclusively on the construction, testing, energisation, and handover phases of solar fa ...

Jobbeschreibung

Commissioning Engineer m/fd (Solar PV – Construction & Energisation Focus)

Overview

We are seeking a Commissioning Engineer specialising in utility-scale solar PV projects. This role focuses exclusively on the construction, testing, energisation, and handover phases of solar farms. You will ensure that all electrical systems are installed correctly, tested safely, and commissioned in accordance with project specifications, UK regulations, and DNO requirements.

You will work closely with EPC contractors, HV specialists, ICPs, and internal engineering teams to deliver fully operational, grid-compliant solar PV plants.

Your mission

• Review design packages, installation standards, and commissioning procedures for compliance with project and DNO requirements.
• Inspect installation quality for PV arrays, inverters, combiner boxes, transformers, switchgear, cables, and SCADA systems.
• Ensure all equipment is installed according to UK electrical standards, OEM manuals, and safety regulations.
• Verify HV/MV installation readiness for energisation, including substations, RMUs, switchgear, and protection systems.
• Lead onsite commissioning activities for all solar electrical systems, including string testing, IV curve testing, inverter commissioning, HV/MV cable tests, transformer tests, protection relay testing, and SCADA validation.
• Coordinate with DNOs/ICPs for energisation, witnessed tests, and grid compliance (G99).
• Identify, troubleshoot, and resolve commissioning issues such as communication faults, inverter trips, protection issues, and performance deviations.
• Validate system performance, including PR, voltage regulation, reactive power capability, and plant controller operation.
• Ensure successful completion of G99 commissioning tests and all DNO‑required checks.
• Produce commissioning documentation, test reports, redlines, and handover packages.
• Support PAC/FAC milestones and close out punch‑list items.

Your profile

Skills & Qualifications

• Degree or vocational qualification in Electrical Engineering, Renewable Energy, or similar.
• Hands-on experience commissioning utility-scale solar PV or large electrical infrastructure.
• Strong understanding of HV/LV systems, electrical protection, inverter technology, and solar plant controls.
• Ability to read and interpret technical drawings, I/O lists, functional diagrams, and protection settings.
• Comfortable working on active construction sites and performing field-based troubleshooting.
• Strong communication skills and ability to coordinate with EPCs, ICPs, OEMs, and internal stakeholders.

Desirable

• Experience with G99 commissioning and DNO witnessing processes.
• HV authorisation (DNO or private network).
• Familiarity with OMICRON/Megger test kits.
• Experience with hybrid PV BESS commissioning.
• Experience with SCADA systems, networking, fiber optics, and data acquisition.

What we offer

• Independent work in a committed team
• Work in a growing, international company with a start-up mentality
• Workplace in a central location in Saarbrücken with good transport connections
• Open and friendly working atmosphere
• Flexitime model with core working hours

About us

Greencells doesn't just build solar plants — we help shape Europe's energy future. With conviction, responsibility, and strong teams.

With more than 180 completed projects and over 3.3 GWp of installed capacity, we are one of Europe's leading EPC and O&M providers for utility-scale solar power. We provide engineering, construction and technical O&M services for grid-connected PV plants in Germany, the Netherlands, the United Kingdom, Ireland, Romania and Hungary – efficiently, reliably, and always looking ahead.

What drives us:
We build clean energy solutions for a better tomorrow.

It's not just a line – it's what we stand for.

And how we work reflects that: We take ownership. We listen, think ahead and act with purpose. We stay pragmatic when things get complex. And we've got each other's backs when it matters. For us, quality isn't a commitment – it's a mindset.

Whether you manage projects, design systems, balance books or shape communications – you'll find freedom here, not rigid structures. Your ideas matter. Your initiative is welcome. And your impact is tangible – in results, in teams, in the energy transition.

At Greencells, you'll work in intercultural, interdisciplinary teams – with flat hierarchies, real ownership and the chance to make your mark. Flexible working models, mutual trust and opportunities to grow are just as much a part of our culture as the shared ambition to move forward – professionally and personally.

If that sounds like the kind of place you're looking for – we'd love to get to know you.