HV Director - Critical Systems in London

Company Description Ramboll is a global architecture, engineering, and consultancy company. We believe that sustainable change is about creating a thriving world for both nature and people.

Do you want to push the boundaries of your profession and develop your excellence in an open, collaborative, and empowering culture? If this sounds like you, or you're curious to learn more, then this role could be the perfect opportunity. Join our Critical Systems Team as our new Technical Director - Critical Systems and work with us to close the gap to a sustainable future.

Your new role As our new Technical Director - Critical Systems, you will play a pivotal role in leading and developing Ramboll's electrical design capability across the Industrial, Healthcare, Government, Marine, and infrastructure sectors. You will provide specialist expertise in High Voltage (HV) systems up to 33 kV, Low Voltage (LV) networks, and critical power systems including UPS and standby generation. You will also guide clients in improving resilience, redundancy, and reliability, while supporting the decarbonisation and electrification of private networks. Your work will cover the full lifecycle of private power distribution systems, from concept and feasibility studies through detailed design, commissioning, and operational optimisation.

Key areas of focus will include:

• Design and specification of HV substations up to 33 kV, including switchgear selection, transformer sizing, protection coordination, and earthing system design.
• Production and review of single-line diagrams (SLDs) and network protection studies, ensuring compliance with ENA, IEC, and BS standards.
• Technical leadership for resilient electrical systems, incorporating redundancy topologies (N+1, 2N) and mitigation of single points of failure.
• Guidance on private HV network connections to Distribution Network Operators (DNOs), including G99/G100 compliance, load flow analysis, and fault level management.
• Supporting clients in future-proofing their electrical infrastructure for low-carbon technologies such as battery storage, renewable integration, and electric vehicle charging.
• Leading technical assurance and governance to maintain the highest standards of quality across all electrical deliverables.

Your key responsibilities will be:

• Act as the UK electrical subject matter expert for all Critical Systems projects up to 33 kV.
• Lead concept, feasibility, and detailed designs for HV and LV power distribution systems in mission‑critical and industrial environments.
• Develop and review equipment specifications, protection philosophies, and earthing and bonding designs.
• Undertake and review network modelling and analysis, including:

• Protection coordination studies
• Short‑circuit and fault level calculations
• Load flow and power quality studies
• Arc flash hazard analysis and mitigation strategies

Your new team You will join a skilled, multi‑disciplinary technical team working alongside project managers and engineers across multiple offices and regions. You'll be the go‑to authority on HV systems and resilient electrical design, supporting colleagues in delivering technically excellent and sustainable outcomes for clients. Our team's mission is to improve the efficiency, reliability, and sustainability of electrical infrastructure while supporting the UK's net‑zero transition. We work across the project lifecycle – from feasibility studies through to detailed design, commissioning, and operational optimisation.

About you From the moment you start at Ramboll, we'll support your professional development and continued learning through access to our global networks and technical communities. For this role, success will come from a combination of deep technical expertise, leadership capability, and commercial awareness.

Qualifications and skills that will set you up for success:

• Degree in Electrical Engineering or a related discipline, with experience in HV and LV design.
• Proven experience in private HV networks up to 33 kV, including substation design, switchgear specification, and protection coordination.
• Chartered Engineer (CEng) status, ideally with the IET.
• Proficiency in power system analysis software such as ETAP, Trimble or equivalent.
• Demonstrated capability in protection studies, fault analysis, load flow, and arc flash assessments.
• Strong understanding of resilience and redundancy architectures (N+1, 2N) and their application to critical systems.
• Experience with DNO interfaces, G99 compliance, and relevant ENA standards.
• Knowledge of low‑carbon and energy transition technologies, including battery energy storage systems (BESS) and renewable integration.
• Excellent communication and stakeholder management skills, with the ability to translate technical detail into clear commercial and operational outcomes.

What we can offer you Be valued for the unique person you are. Never be short of inspiration from colleagues, clients, and projects. The long‑term thinking of a foundation‑owned company. Flexible work environment. 27 days annual leave plus bank holidays. Matched pension contributions. Private medical cover and life assurance.

Work at the heart of sustainable change The Critical Systems team is driving innovation in resilient electrical infrastructure and low‑carbon power networks up to 33 kV, enabling clients to deliver reliable operations while progressing toward a sustainable, net‑zero future. Ready to join us? Please submit your application. Be sure to include all relevant documents including your CV, cover letter, etc.

We recognise that some candidates only apply when they tick every box. However, passion and potential often outweigh a perfect resume and Ramboll's supportive learning culture can help you grow. So if this role resonates with you but you don't meet all the requirements, we encourage you to apply. You might be the perfect fit for this opportunity or another within our team.

Thank you for taking the time to apply! We look forward to receiving your application.

Ramboll in the United Kingdom Founded in Denmark, Ramboll is a foundation‑owned people company. Ramboll has a proven track record of sustainable and responsible business and is a top ten engineering and environmental and sustainability consultancy in the UK, with more than 1,500 employees across 16 offices working towards a more sustainable future. Ramboll experts deliver innovative solutions across Buildings, Transport, Environment & Health, and Energy. Strong values guide what we do and drive an inclusive, collaborative, and highly flexible culture that values people and ideas. Explore and nurture your own passion, expertise, and creativity at Ramboll through work that benefits our people, partners, nature, and society.

An equal opportunity employer Equality, diversity, and inclusion is at the heart of what we do. At Ramboll, we believe that diversity is a strength and that different experiences and perspectives are essential to creating truly sustainable societies. We are committed to providing an inclusive and supportive work environment, where everyone is able to flourish and reach their potential. We invite applications from candidates of all backgrounds and characteristics, in addition to the Protected Characteristics as set out in the Equality Act, (2010). As a Disability Confident Committed employer, Ramboll ensures opportunities are accessible to candidates with disabilities. Please reach out to our recruitment team to discuss any adjustments that you might require during the application process.

We also know how important it is to achieve the right balance of where, when, and how much you work. When you join Ramboll, you'll have the ability to work your hours flexibly through our positive and inclusive approach to work.