Location: Ruislip, United Kingdom
Contract: Permanent
Working Pattern: Full-Time
Renumeration Indicator: Competitive salary plus company vehicle, pension and private healthcare. Remuneration for this role is benchmarked competitively within the Infrastructure and energy sector, and sits within our D2 band, reflecting the seniority and scope of the position.
The Opportunity
Are you an experienced earthing specialist ready to take ownership of safety‑critical power infrastructure designs? Do you want to play a leading role in HV and EHV substation projects across the UK? We are seeking a Senior Earthing Design Engineer to lead the earthing design elements of major electricity network projects within a regulated Distribution Network Operator (DNO) environment.
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Deliver safe, compliant HV and EHV earthing designs that protect personnel, the public, and critical infrastructure under both normal and fault conditions.
- Drive high-quality engineering outcomes by leading earthing design activities from feasibility through to detailed design in line with DNO standards, ENA specifications, and industry best practice.
- Improve project performance and reduce risk through accurate earthing calculations, modelling, and technical assurance using industry-standard tools and methodologies.
- Build trusted relationships with DNOs and key stakeholders to secure timely approvals, resolve technical challenges, and support efficient project delivery.
- Ensure seamless integration of earthing systems by collaborating closely with electrical, civil, and cable design teams across multi-disciplinary projects.
- Support successful construction and commissioning outcomes by providing technical guidance to contractors, resolving site issues, and reviewing as-built information.
- Champion a culture of safety and continuous improvement by embedding safety-by-design principles, maintaining compliance, and contributing to the ongoing enhancement of earthing design standards and practices.
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Essential:
- Degree qualified in Electrical Engineering or a related discipline.
- Chartered Engineer (CEng) status or actively working towards chartership.
- Significant experience delivering HV and EHV earthing designs for UK electricity network projects.
- Strong understanding of earthing requirements within DNO or ICP environments.
- Proven experience with substation earthing systems for GIS and AIS substations.
- Practical knowledge of UK electrical safety regulations and earthing standards.
- Expert understanding of earthing theory, fault current distribution, soil modelling, and mitigation techniques.
- Ability to interpret and apply ENA, BS EN, IEC, and DNO‑specific earthing standards.
- Confident producing and checking earthing layouts, sections, details, and calculation reports.
- Strong technical writing skills and ability to justify design decisions to clients and authorities.
At OCU Group, we don’t just deliver infrastructure - we help power modern life.
As one of the UK’s fastest-growing utility and infrastructure businesses, we deliver complex, nationally critical projects across power, energy transition, water, telecoms, and digital infrastructure. Over the last five years, OCU has grown five-fold to a £1.1bn organisation, expanding both organically and through strategic acquisitions across the UK, Australia, New Zealand and India.
Our growth is driven by ambitious people, operational excellence, and a commitment to doing things properly. We work on projects that genuinely matter by supporting the UK’s energy transition, strengthening essential infrastructure, and helping build more sustainable communities for the future.
Whether you’re an experienced professional looking to take ownership of major projects and influence delivery at scale, or someone starting your career through an apprenticeship, graduate programme, or placement route, OCU offers real opportunity to grow, develop, and make an impact.
We are building a business where high performance, collaboration, innovation, and accountability sit at the centre of our culture. Our people are trusted to lead, encouraged to challenge thinking, and supported to continuously develop their skills and careers.
At OCU, you won’t just join a growing business, you’ll help shape it.
Our Culture & Values
At OCU, our values are at the heart of everything we do. We care about safety, lead with integrity, strive to be better every day, make a positive impact, and deliver to grow, together, as One Company United.
Our Commitment to Inclusion
At OCU Group, we believe diversity, inclusion, and belonging are fundamental to building stronger teams, better ideas, and a more successful business. We welcome applications from people of all backgrounds and are committed to creating an environment where everyone feels valued and supported.
As part of our commitment to fairness and equality, candidates may be asked to complete an equal opportunities monitoring form during the recruitment process. This information is used for monitoring purposes only and plays no part in hiring decisions.
We are proud to be a Disability Confident employer and are committed to offering interviews to candidates with disabilities or long-term health conditions who meet the essential criteria for the role.
To ensure that everyone has a fair opportunity to join our team, please inform us if you require any reasonable adjustments to our recruitment and interview process is, by emailing
[email protected].
