Overview
For our Operations & Maintenance team in the United Kingdom, we are looking for an experienced, hands-on Senior Technician who combines day-to-day field work with technical leadership. You will maintain and repair commercial and utility-scale PV plants in operation, carry out HV switching as Senior Authorised Person (SAP), support the commissioning of new plants and train colleagues directly on site.
Your mission
Operation and maintenance of PV plants
- Carry out preventive and corrective maintenance on operational commercial and utility-scale PV plants to keep them safe, available and performing in line with agreed SLAs
- Perform electrical testing (insulation resistance, continuity, IV curve tracing, thermography) and complete the associated certification documentation
- Inspect and maintain modules, inverters, combiner boxes, transformers, switchgear, cabling, monitoring and security systems
- Maintain accurate records of all work, including service reports, photos and test results, in our field service and CMMS systems
Fault response, switching and repair
- Respond to faults and outages on site, diagnose root causes and carry out repairs, including replacement of inverters, isolators, modules and other components
- Act as Senior Authorised Person for LV, HV and EHV systems: plan, authorise and carry out switching operations on 11 kV / 33 kV switchgear, ring main units, transformers and substations, including isolation, earthing and LOTO
- Issue and cancel safety documents (permits-to-work, sanctions for test, limitation of access) and ensure RAMS and Electrical Safety Rules are in place and followed
- Take part in the on-call rota and act as technical point of contact for DNOs / IDNOs and asset owners on grid connection and HV matters
- Coordinate warranty claims and technical escalations directly with Tier 1 manufacturers of modules, inverters, transformers and switchgear
Commissioning of new plants
- Support the commissioning of new PV and hybrid PV/BESS plants as required, including LV/HV testing, energisation and functional checks
- Support EPC handover processes and ensure a smooth transition into operations
- Support retrofits, upgrades and the implementation of monitoring, PPC and SCADA solutions
Team leadership and development
- Train and onboard new colleagues directly on our plants, passing on practical, technical and safety know-how in day-to-day work
- Act as mentor and day-to-day lead for the technicians in your team, and assess and appoint Authorised and Competent Persons within the team
- Work closely with the Head of O&M on the planning of field activities, maintenance schedules, SOPs and safety procedures
- Contribute to the continuous improvement of KPIs, SLA performance and the overall service offering, and support quotations for additional technical services
- Ensure all work complies with the Electricity at Work Regulations 1989, BS 7671, CDM Regulations, applicable ENA guidance and UK health & safety legislation
- Travel regularly to sites across the UK and, where required, to Greencells locations in Europe
Your profile
- Completed technical education (e.g. HNC/HND, apprenticeship or degree) in electrical engineering or a related discipline
- Several years of hands-on field experience in photovoltaics, with a clear focus on commercial & industrial (C&I) and/or utility-scale ground-mounted and rooftop systems
- Current appointment or demonstrable experience as Senior Authorised Person (SAP) for HV systems; competence for LV, HV (11 kV / 33 kV) and ideally EHV is essential
- All relevant UK certifications, such as 18th Edition BS 7671, City & Guilds 2391 (Inspection & Testing), HV switching and authorisation training, ECS/JIB card and SSSTS/SMSTS; IPAF and First Aid are an advantage
- Proven experience with Tier 1 manufacturers, e.g. inverters (SMA, Huawei, Sungrow, Power Electronics, SolarEdge), modules (LONGi, JinkoSolar, Trina, JA Solar, Canadian Solar) and HV equipment (Schneider Electric, Siemens, Hitachi Energy, Lucy Electric)
- Practical experience in fault finding, repair and commissioning of PV plants, including HV substations
- Experience in training and leading technicians in the field
- Sound knowledge of G99 requirements, grid compliance, PPC/SCADA systems and ideally hybrid PV/BESS installations
- Ability to read and interpret SLDs, protection settings, technical specifications and test reports
- Motivation to work on site every day
- Strong communication skills, customer orientation and confidence in dealing with asset owners, DNOs and senior stakeholders
- Willingness to travel nationwide and occasionally internationally; full clean UK driving licence
- A responsible, proactive and solution-oriented approach to work, with the ability to apply professional expertise effectively in day-to-day activities
- A commitment to respectful, trusting collaboration and mutual support within the team
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 190 completed projects and over 4.1 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.
Senior Technician / Team Lead Field Services (m/f/d) in London Arbeitgeber: Greencells Group
Greencells bietet als Arbeitgeber eine dynamische und unterstützende Arbeitsumgebung, in der Mitarbeiter die Möglichkeit haben, an internationalen Großprojekten im Bereich der Erneuerbaren Energien mitzuwirken. Mit einer offenen und freundlichen Arbeitsatmosphäre sowie flexiblen Arbeitszeiten fördert das Unternehmen die persönliche und berufliche Entwicklung seiner Angestellten. Zudem profitieren die Mitarbeiter von einer zentralen Lage in Saarbrücken mit hervorragender Verkehrsanbindung und attraktiven Zuschüssen für Parkmöglichkeiten oder den öffentlichen Nahverkehr.
